"Excellent practice lock for a newbie like myself."verified buyer, 05/16/2023
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Description
Dangerfield Clear Acrylic Practice Lock - Standard PinsFree UK delivery over 30 Royal Mail options 30 day easy returns European delivery available Clear standard pin trainer See the pin stacks move while you learn tension This Dangerfield clear acrylic practice lock is the simple visual trainer most beginners should use early. Standard pins keep the lesson clean: tension, lift, binding order, and shear line without security pin tricks getting in the way. Clearacrylic body Standardpins Visualfeedback
Free UK delivery over £30
Royal Mail options
30-day easy returns
European delivery available
Clear standard-pin trainer
See the pin stacks move while you learn tension
This Dangerfield clear acrylic practice lock is the simple visual trainer most beginners should use early. Standard pins keep the lesson clean: tension, lift, binding order, and shear line without security-pin tricks getting in the way.
Clearacrylic body
Standardpins
Visualfeedback
Beginnertrainer
"Saw these and just had to get one, and guess what?"verified buyer, 02/27/2016
"I'm quite impressed with the quality of the lock"customer review, 12/02/2016
Why buy this
Buy this when hidden feedback is slowing you down
Lock picking can feel invisible at first. A clear standard-pin lock makes the cause and effect obvious: turn the plug, lift the pin, watch the shear line, and connect that view to what your hands feel.
Fast first lesson
See why too much tension traps pins and why too little tension loses progress.
Standard pins first
Learn the core mechanism before adding spool, serrated, tubular, or dimple challenges.
Confidence builder
Use the clear view to understand the open, then repeat without watching.
Practice route
Best way to use a clear lock
Do not only watch the pins. Use the clear view to diagnose the movement, then close your eyes or cover the lock and repeat the same open by feel.
- Start with one hook and one tension wrench.
- Change tension pressure before changing picks.
- Move to a progressive lock set once this feels repeatable.
Helpful next step: Dangerfield EUREKA progressive locks.
Product details
What to know before you choose
| Brand | Dangerfield |
| Product type | Clear acrylic practice lock |
| Pin style | Standard pins |
| Training focus | Visible pin movement and tension feedback |
| Best use | Beginner lock picking practice |
Use lock picking and entry tools responsibly, only on locks you own or have permission to work on, and check local laws before buying.
Questions
Quick answers
Is a clear lock cheating?
Not at all. It is a training tool, like looking under the bonnet while learning how a mechanism works.
When should I move on?
When you can open it repeatedly without relying on the clear view.
Why standard pins?
They isolate the basic lesson before security pins add extra feedback.
What pick set suits it?
Any focused beginner set works well: PXS-14, Serenity, PRAXIS, or a simple hook-and-rake kit.
Make the first lesson visible
This is the clear trainer to buy when you want pin movement, tension, and the shear line to finally make sense.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 5
Engaging Read for Beginners and Techies Alike
Format: Paperback
An engaging and accessible exploration of how computers really work. The author breaks down complex concepts into simple, relatable explanations, making topics like binary, logic gates, and basic circuits far less intimidating. For newcomers, it’s a great way to build a foundational understanding of computer theory with just a touch of electrical engineering.
As someone with a technical background, I still found it entertaining; the examples and analogies added fresh ways to frame ideas I already knew. It’s the kind of book that can bridge the gap between “I use computers” and “I understand what’s happening under the hood.”
Highly recommended for anyone curious about what makes hardware and software tick, whether you’re starting from scratch or just want a new perspective.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 19, 2025
★★★★★ 5
CODE is the book you should get.
Format: Paperback
The best book to enter the field. Grateful that Charles Petzold decided to write it, even happier this was one of the first books I picked up.
Recommend to everyone wanting to become a programmer, or just interested in computers.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 12, 2026
★★★★★ 5
If you only buy one technical computer book, this is it
Format: Paperback
Disclaimer: I owned the first edition for years and read it a dozen times, mainly for pleasure since it’s not only informative but also just enjoyable to read. I’m a professional software architect and have dozens of textbooks on computer science and engineering so I’ve been around the block.
This is the kind of book I would buy all for all my friends (if I had more than a couple) and family members (if they were even slightly into computers, which they aren’t sadly). Petzold does an exceptional job at describing digital logic and guides you through building a conceptual CPU from very first principles.
I think his bottom up approach is the way to go and has helped me understand complex topics in an extremely simple way. When I’m not reading fiction, this is my go to bedtime reading.
The second edition has about 100 more pages than the first and some content has been completely reworked and it’s great.
If you ever had even a passing interest in knowing how computers work at a very fundamental level, get this book!
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Reviewed in the United States on January 31, 2023
★★★★★ 4
First programmer?
Format: Paperback
As an ardent reader of the past 1st edition, I was fairly excited to get the latest version. That is, until I encountered the history chapter of the new edition.
For one thing, what I do NOT understand in this second edition is the newly added description of August Ada Byron (countless of Lovelace). The author claims it was Babbage who was the first programmer to design the engines, not Ada. I am not trying to start a futile argument here about who has more or fewer contributions, etc.
What I am trying to assert here is that it is undisputed that Ada (unless the new evidence arises) left *the very first demonstration* of what this seemingly imaginary machine, which didn't even physically exist, was capable of through her program. Because Babbage designed the engine itself, that doesn't automatically put him in the position of a programmer (despite Babbage being a brilliant engineer/scientist and may have had a simple or detailed program in his mind). However, it was Ada who gave a definite touch to programming concepts that ultimately led to modern-day programming. Ada deserves more recognition than a mere "tutorial writer," and she is certainly entitled to the title she deserves.
Other than that, like the previous edition, this book is a must-read for people who are from related/unrelated fields. I always loved the 1st edition, and I would do too with the 2nd. Still, I think history should always be approached with more care, particularly if matters have potential controversies.
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Reviewed in the United States on January 6, 2023
★★★★★ 5
One of the few books worth your time
Format: Paperback
If you want to learn computers, start here. Learning from a historical perspective removes complexity of trying to start with say GPUs - you learn just like computer engineers did, incrementally.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
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