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How to Crack Your Master Lock Combo in 3 Easy Steps

3,991,810 views October 29, 2015 6:00

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ChannelAlice Zhao

In brief

Unlock a Master Lock combo without tools by identifying the first and last numbers through dial clicks, then narrowing down the middle number with trial and error. This method works for standard Master Locks and avoids guesswork with systematic testing.

Key steps

  1. Press the U-shaped part of the lock to find the first number where the dial clicks.
  2. Test three sets of four numbers (e.g., 0-10-20-30) to spot the third number that clicks differently.
  3. Use the first and third numbers to test middle numbers in increments of 2 or 2.5.

Description from the creator

After watching a number of videos on how to recover my Master Lock combo, I still wasn't able to figure out my combo code following one set of steps, so I decided to create my own video combining the best techniques I found.

The three steps I list do not require any tools, pen or paper:

1. Figure out the first number of the combo code
Apply just enough pressure to the u-shaped part of the lock so that when you are rotating the dial, it clicks in only one spot. That is the first number of the combo code.

2. Figure out the last number of the combo code
Find three sets of four numbers (in increments of 10) that "click" as you go around the dial. For me they were 0-10-20-30, 3-13-23-33 and 7-17-27-37. For each set of numbers, they should each "click" at about the same position for each number. Out of the three sets of numbers, the one number that "clicks" at a different position is the third number of the combo code.

3. Use trial and error to figure out the second number of the combo code
Now that you know the first and third number of the combo code, you can try out different numbers for the second number. My suggestion is to start at 0 and go up in increments of 2 or 2.5. That way, you'll only have to try a maximum of 30 numbers.

The serial number on the back of my Master Lock is 0713M. Hope that helps!

About this tutorial

Alice Zhao published this 6:00 video tutorial on October 29, 2015. It has been watched 3,991,810 times on YouTube.

Channel
Alice Zhao
Duration
6:00
Published
October 29, 2015
Views
3,991,810
Likes
17,927

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