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MasterLock Combo Cracker (script)

Uses Samy Kamkar's algorithm to make a set of possible combinations for MasterLock's padlocks. 3 values are needed in order to predict the combination, and they are:

    1. First locked position
  • Set the dial to 0.

  • Apply pressure upward on the shackle, like you are opening it.

  • Rotate the dial counter-clockwise (towards 5) until the dial is locked and will not turn.

  • You will be unable to turn around a number, but this value do not matter yet.

  • Skip these number by releasing pressure on the shackle, turn the dial enough to get past where you were stuck.

  • Again, apply pressure upward on the shackle, as if you are opening it, and continue to turn the dial left.

  • If you are stopped on a whole number, record that value.

  • If you are stopped between two halfs (3.5 - 4.5) - use the number between (4).

  • (Remember, this value shouldn't be the 1st locked position value, since we skipped it, it should be the 2nd)

    1. Second Locked Position
  • Continue from where you left off above, from the recorded locked position.

  • Continue putting upward pressure and turning the dial until you are in the next locked position.

  • If you are stopped on a whole number, record that value.

  • If you are stopped between two halfs (6.5 - 7.5) - use the number between (7).

  • (Remember, this value shouldn't be the 2nd locked position value, since we already recorded that, it should be the 3rd)

  • Also, the 2 recorded values should be before you pass 11, if not, restart the process and carefully record the positions.

    1. Resistance Location
  • Apply less pressure to the shackle as you did before (about half), so the dial can turn and not get locked in place.

  • This time, rotate the dial to the right, until you feel resistance.

  • Note the value (with 1 decimal place) that resistance begins to happen. ie (14.5 or 15.0)

  • Rotate the dial several more times to ensure that the recorded value is indeed the resistance location.

    1. Finding the 'Correct' 3rd digit
  • Set the Dial to the first posibility for the '3rd Digit'

  • Apply full pressure upward on the shackle, as if you are opening it.

  • Turn the dial and note how much give there is (whether it be half a number or 2 full numbers worth).

  • Loosen the shackle and set the dial to the next possibility for the '3rd Digit'

  • Apply full pressure upward again, and note the ammount of give for the 2nd option of the 3rd digit.

  • Whichever option has a greater give, use that option (1 or 2)

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🔐 Cracks MasterLock Padlocks using 3 values.

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