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Description
Bosch HTW118 1-1/8 Inch Edge Impact Tough Bi-Metal Hole Saw 8 TPI Sheet Metal Core Drill Bit with 1/4 Hex Shank and Depth Stop Power Tool AccessoryHigh Torque Sheet Metal Cutting Premium One Piece Impact Rated Core Drill Bit with Automatic Plug Ejection Engineered to handle the violent rotational forces of modern high output cordless impact drivers, the Bosch HTW118 1 1 8 Inch Edge Impact Tough Bi Metal Hole Saw delivers outstanding commercial grade durability. Designed specifically for professional HVAC technicians, residential electricians, automotive fabricators, and metal workers, this
High-Torque Sheet Metal Cutting – Premium One-Piece Impact-Rated Core Drill Bit with Automatic Plug Ejection
Engineered to handle the violent rotational forces of modern high-output cordless impact drivers, the Bosch HTW118 1-1/8 Inch Edge™ Impact Tough™ Bi-Metal Hole Saw delivers outstanding commercial-grade durability. Designed specifically for professional HVAC technicians, residential electricians, automotive fabricators, and metal workers, this innovative accessory provides up to 2X the tool life over standard impact-rated hole saws. The specialized 8-TPI (teeth per inch) bi-metal profile is precision-ground to slice rapidly through thin sheet metal, electrical junction boxes, ductwork, and steel plates, providing lightning-fast, burr-free cuts without binding, chattering, or stripping the cutting edge under intense operational pressure.
This heavy-duty metal core bit is engineered with an advanced one-piece integrated construction, which means there are absolutely no loose arbors or separate pilot bits to assemble before getting to work. Equipped with a permanent solid shoulder depth stop, it protects your workspace by preventing accidental tool breakthrough—making it the ideal choice for drilling safely near internal electrical wiring, hidden plumbing pipes, or sensitive mechanical components. Featuring a universally compatible 1/4-inch hex shank that locks instantly into all quick-release impactors and traditional drill chucks, this premium sheet metal saw includes a heavy-duty pilot bit spring that delivers automatic, hassle-free metal plug ejection on every single cut.
Key Features
- Edge Impact Tough Endurance: Advanced heat-treated bi-metal architecture yields up to 2X the service life over standard competitive impact hole saws.
- Optimized 8-TPI Bi-Metal Profile: Fine-pitched teeth are engineered to make swift, incredibly clean cuts in sheet metal while resisting tooth fracture.
- Integrated Solid Depth Stop: Built-in safety collar prevents aggressive tool over-travel and destructive breakthroughs, safeguarding underlying components.
- Automatic Plug Ejection Spring: Heavy-duty compression spring wraps the pilot bit to automatically pop out hot metal discs instantly after completing the cut.
- Universal 1/4-Inch Hex Shank: Form-fitted base guarantees a non-slip grip in high-torque impactors, standard cordless drills, and right-angle drivers.
- Convenient One-Piece Architecture: Eliminates separate mandrels, arbors, and pilot drill installations to streamline your workflow on the jobsite.
What's Included
- 1 × Bosch 1-1/8 Inch Edge™ Impact Tough™ Bi-Metal Sheet Metal Hole Saw with Integrated Shank & Pilot Bit (HTW118)
Specifications
| Specification Field | Product Details |
|---|---|
| Brand Manufacturer | Bosch |
| Manufacturer Part Number (OEM) | HTW118 |
| Hole Saw Diameter | 1-1/8 Inches (1-1/8 in.) |
| Shank Interface Type | 1/4 Inch Quick-Change Hex Shank |
| Teeth Pitch Density | 8 TPI (Teeth Per Inch) |
| Material Composition | Premium Bi-Metal (High Speed Steel Cutting Edge) |
| Tool Construction Style | Integrated One-Piece Body (Arbor & Pilot Included) |
| Assembled Tool Depth | 2.75 Inches (2.75 in.) |
| Tool Rating Class | Impact Tough / High-Torque Driver Compatible |
| Primary Project Target | Thin Sheet Metal, Ductwork, Panels, and Enclosures |
| Product Condition | Brand New Original Equipment Accessory |
| Item Net Weight | 0.33 lbs |
| Country of Origin | Taiwan |
| UPC Barcode | 000346397604 |
💡 PRO-TIP: High-torque impact driver concussive blows generate significant metal-on-metal heat instantly. When drilling through structural cold-rolled sheet metal or steel framing studs, apply a quick squirt of dedicated cutting oil or generic lubricating spray directly to the bi-metal 8-TPI teeth to keep the temperature down and maximize the lifespans of your premium Edge blades!
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4.3 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 5
Essential reading
Format: Audiobook
I wish I’d learnt this history decades ago.
This book illuminates how the world has, for many of us, come to be seen through a white supremacist lens.
It provides religious, political, technological, sociological context over centuries and Millenia.
It explains the justifications used to treat our fellow humans as ‘less than’ - the sort of thinking that we in the ‘western’, white, colonial world have inherited, that persists through literature, philosophy and mythology, and that continues to fuel bigotry and oppression today.
Eye opening. Can’t recommend more highly (book, kindle, audiobook).
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Reviewed in the United States on January 27, 2026
★★★★★ 5
Perhaps too ambitious for its own good
Having just finished Dr. Kendi's magnum opus on the history of American racism, I can confidently say that this is a very ambitious work. It attempts to describe the political, social, economic, philosophical, and cultural development of racist ideas throughout American history while at the same time, offering biographical sketches of 5 Americans who were/are representative of their time and place (Cotton Matther/Colonial America, Jefferson/Revolutionary era, William Garrison/Civil War and Reconstruction Era, W.E.B. DuBois/Jim Crow era, and Angela Davis/Civil Rights and Black Power era).
Perhaps it's a bit too ambitious, though. The amount of ground the book tries to cover prevents it from being able to cover anything in great detail. Thus, the biographies of the 5 individuals are incomplete, and the racist or assimilationist ideas in each time period are discussed superficially. Dr. Kendi's book also jumps around a lot from one subject to another, which can be a bit jarring or disrupt the flow of the narrative. Don't get me wrong. The book does a very good job explaining how a lot of what has passed for antiracism in US history was really assimilationist thinking, and it also convincingly argues that racism and racist policies flow from the political, economic, or social advantages that one group gains by the persecution of the other. However, I am left with the distinct impression that Dr. Kendi should've narrowed his focus to something that could've been more manageable. Perhaps he should've focused exclusively on the difference between antiracism vs assimilation. Perhaps instead of attempting biographies of 5 individuals, he should've devoted each chapter (or section) of the book to discussing the racist or assimilationist ideas of that time period, and how they developed or changed over time.
Overall, my best advice would be to get this book and read it, because it's very timely with what's going on right now in America, but for those areas that aren't covered in a lot of detail, I would try to supplement it with other literature.
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Reviewed in the United States on July 28, 2020
★★★★★ 4
Interesting and important read, but less objective than I expected.
Format: Hardcover
I feel this book has received higher review ratings than it probably deserves. Yet, it's still an overall good read and it discusses an important societal issue of U.S. history. This review will include both positive and negative feedback of this book.
The author, Ibram Kendi, has done a great job at making this book accessible to readers. It's not overly infused with academic jargon. The chapters are also quite short, which makes it easier to read. The substance of the book is pretty informative too. Kendi's frequent usage of quotes really exposes the racist attitudes and ideas that were (and still are) present in American society.
Although this book contains an abundance historical quotes, many of them lack sufficient explanation and context. As a student of history, I appreciate deeper, rounded discussions of historical figures. I felt that Kendi mostly includes short bits of statements from historical figures, then hastily shows how those statements equal racism in the person being discussed. I guess Kendi's style is OK. It just doesn't quite feel dedicated to historians craft. Another, less important critique is about the book title's usage of the term "Definitive." I'm surprised that this work was labeled as definitive. To be definitive, it would need to include racial histories of ALL ethnic/racial groups throughout both the American colonial and U.S. eras. Alternatively, this book's title may have been more appropriate as "The Definitive History of Racist Ideas Towards Peoples of sub-Sarahan African Descent in America."
Overall, I'm glad I purchased and read this book. It boldly explains certain sides of history that much of our society has missed. I did not grow up in a "racist" household. Yet, this book helped me reflect on my own attitudes, which have been influenced by racist ideas to some degree. I hope others (especially other Americans) can read this book with an open heart and mind.
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Reviewed in the United States on August 12, 2018
★★★★★ 5
The REAL American History
Bearing 511 pages of text supported by nearly 70 pages of footnotes, Ibram X. Kendi’s Stamped From the Beginning (Bold Type Books, 2017) is, for me, not an “alternative” American history but THE American history.
Kendi, founding director of the Boston University Center for Antiracism Research, makes a convincing argument—which he emphasizes in his other books and public speaking—that, contrary to conventional assumptions, racist policies drive racist thinking and not the other way around. And, Kendi adds, it’s economic, political, or cultural self interests that give birth to such policies and motivate their rejection when new circumstances demand it.
In making his case, Kendi patiently and passionately traces the development, implementation, and adaptations of three racial dynamics across the history of the U.S.:
1. Segregation: Blaming Black people themselves for racial disparities, and therefore denying them the privileges 2. enjoyed by white Americans
3. Assimilation: Blaming Black people and racial discrimination for racial disparities, and demanding Black people change their behavior in order to experience less racism
Antiracism: Pointing to racial discrimination and policies while defending Black people’s right to be themselves
In addition, Kendi structures this narrative across five lengthy sections, each centered on the impact of a specific, influential “tour guide” and their contemporaries:
1. Cotton Mather, early America’s greatest preacher and intellectual, and a staunch promoter of racist policies and ideas
2. Thomas Jefferson, primary author of the Declaration of Independence, and America’s first Secretary of State, second Vice President, and third President, who held contradictory views amid incongruous political and personal actions
3. William Lloyd Garrison, an influential publisher who opposed slavery but embraced assimilationist ideas
4. W. E. B. DuBois, a towering Black intellectual who gradually shifted from assimilation to antiracism
5. Angela Davis, one of the best known Black scholars and antiracist activists still alive today
When you’re done reading Stamped From the Beginning, you’ve gained a new framework for noticing and examining race and its interrelated justice issues. Current racial events take on a richer meaning, with their nuances and complexities more tangible than before. Other books on racial justice help to reinforce this framework and further develop a reader’s embryonic skills for noticing racism within themselves, others, policies, and systems—and doing something about it.
To grow increasingly fluent in Black history is to awaken from the slumber of an incomplete, biased, and often false American narrative that’s been drilled into most of our minds since we were young children. Since racism remains very much alive today, waking up is crucial and, from my experience, invigorating and teeming with possibilities for a more purposeful life.
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Reviewed in the United States on August 15, 2020
★★★★★ 5
This should be required reading for everyone..
Stamped From the Beginning discusses the history of racism and racist ideas in America. Kendi focuses on five main people who have made the biggest impact on racism and anti-racism in our history: Puritan minister Cotton Mather, Thomas Jefferson, abolitionist William Lloyd Garrison, W.E.B. Du Bois, and legendary activist Angela Davis.
“When men oppress their fellow-men, the oppressor ever finds, in the character of the oppressed, a full justification for his oppression.” Douglass, amazingly, summed up the history of racist ideas in a single sentence.” - (Fredrick Douglass)
This was an incredibly powerful and educational book. I knew going into this book that the United States education system has failed at teaching the history of slavery, emancipation, Jim Crow, and the continued struggle. But it still amazed me at how much it doesn’t teach. With every single chapter I learned new things that should have been taught to me in school.
While this is a very large book filled with history, it was an easy read. Normally I would have read this book in a few days but instead I stretched it out over a month and a half. I read, reflected, took notes, did more research and I still know that I have a lot to learn. My book is now covered in sticky notes and I know I will be rereading this in the future because I know I missed stuff.
“That is what it truly means to think as an antiracist: to think there is nothing wrong with Black people, to think that racial groups are equal. There are lazy and unwise and harmful individuals of African ancestry. There are lazy and unwise and harmful individuals of European ancestry. There are industrious and wise and harmless individuals of European ancestry. There are industrious and wise and harmless individuals of African ancestry. But no racial group has ever had a monopoly on any type of human trait or gene—not now, not ever.”
This book changed the way I viewed the history of the United States. So much of this history has been glossed over by the education system, and other history books. This book should be required reading for everyone especially since the education system won’t teach us the true history of the United States. All I can say is, READ THIS BOOK!
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Reviewed in the United States on October 1, 2020
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