How to Find the Combination of a Number Lock Using a Shim

This educational animation demonstrates a method for bypassing a standard combination lock using a thin, flat tool known as a shim. By inserting the shim between the number wheels, the user can feel for a small notch or indentation on the internal cam of each wheel. When the shim drops into this notch, it indicates that the wheel is aligned correctly for the combination. By repeating this process for each wheel, the correct sequence can be identified. This visual guide highlights the mechanical vulnerabilities inherent in simple combination locks, emphasizing why they are not suitable for high-security applications.

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Comments

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haruto_55xNewcomerAug 25, 2026

I feel like I would definitely break the lock trying this

the_avaNewcomerAug 25, 2026

That is actually super clever, I had no idea it worked like that

souza.rafaelNewcomerAug 25, 2026

That is actually super clever, I had no idea they worked like that

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li.haoNewcomerAug 25, 2026

My ADHD brain would still somehow manage to lose the shim and lock myself out anyway πŸ˜…

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saraahmadi82NewcomerAug 25, 2026

That is actually super clever, I had no idea they were that easy to bypass

olivia_brownNewcomerAug 25, 2026

I feel like I would definitely lose the shim and end up just staring at the lock instead

alejandro_ramrezNewcomerAug 25, 2026

I would definitely lose the shim and end up even more stuck than before πŸ˜…

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mateus_95xNewcomerAug 25, 2026

That is actually super satisfying to watch, thanks for sharing this.

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ferrari.chiaraNewcomerAug 25, 2026

That is actually super satisfying to watch, I had no idea it worked like that

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the_laylaNewcomerAug 25, 2026

Wait, does this mean my gym locker has been basically useless this whole time?