How to Crack a Masterlock Padlock Combination in 100 Tries or Less!



  1. 1 Note that a standard 40-digit Master Lock has 64,000 possible combinations that may open the lock.[2] However, don’t let that discourage you. If you don’t know the serial number, then you can significantly narrow down the number of possible combinations to crack your lock (Method 1). If you know the serial number, you can request the combination directly from Master Lock (Method 2).



7. Cryptex USB Stick Physically Protects Your Data

Price: $50 – though prices vary with memory size.

Designed by Stanislav Tatarinov, the Cryptex USB Stick has been around for a few years now but it’s still one of the most unique combination locks and USB sticks on the market. It is, like others on the list, a mechanical form of a combination lock with the USB stick itself having a total storage capacity of 8GB, 16 GB or 64GB.  

The USB stick measures 6.5 by 2 by 2 cm with the sheath or pocket measuring in at 10 by 6.7 by 6.7 cm

Overall it has a very solid, high quality, zinc alloy metal build and also comes with a velvet pouch accessory to protect it in transport. The combination is entered using the device’s series of rotating rings with a choice of letters or numbers to enter a pre-defined 5-digit code. 

The manufacturer claims it has been designed according to Leonardo Da Vinci’s original plans with some modifications to accommodate a USB stick.

Overall the Cryptex USB Combination Lock has received good reviews with some reports that the USB stick itself was somewhat sub-par. Also, some other reports indicate that the dials themselves can be rather stiff.

Source: Amazon
Source: Amazon

Step 4: Finding Your 2nd Number

  you just do the same thing but you need to change the starting number. you do this by changing your remainder. if your remainder is 0 change it to 2  1=3  2=0  3=1 in my example though you would change it to three since the remainder is 1. so here are the possible numbers using my example                                                                                                   3,7,11,15,19,23,27,31,35,and 39 next step will tell you how to find the combinations.

14.Sargent Greenleaf 8077AD Combination Padlock Takes Combination Locks to a Whole New Level

Price: Varies depending on the dealer

Sargent and Greenleaf have been providing security devices for over 150 years. If they haven’t yet perfected their art then no one ever will.

So when considering their 8077AD Combination Padlock you know you are in good hands. According to their website, the lock meets U.S. Federal Specification FF-P-110J.

They also claim that it is “used in large quantities by government agencies to secure file cabinet locking bars. It is designed to resist surreptitious entry methods and show any signs of tampering. It can be set to new combinations using the included change key.”

Each combination lock has unique serial numbers on each of its critical pieces to ensure that no one has gained access and replaced these parts. It combination dial allows for 125,000 combinations too.

Each combination can be reset with a master change key unique to the padlock. The lock has a hardened steel shackle and comes with one year warranty.

Source: SargentAndGreenleaf
Source: SargentAndGreenleaf

Step 2: First Find Your Third Number

  To find your third number reset the lock by turning the dial around a few times. Then start at 0 and turn to 3. after that pull the clamp up as hard as you can and move the dial left and right very little. Find a spot after zero and between 5 or 10 that the dial seems to be stuck. take the 2 numbers they stop on and get the middle number.  For example the dial stops on 2 and 3. your number would be 2.5 or if you numbers were 2.5 and 3.5 your number would be 3. write these down. Not the ones I gave you but the ones you get. Repeat this around the dial until you get 12 different numbers. You have to get twelve or it wont work.                                                                                              example list 2.5 6 9.5 13 16 19.5 22.5 26 22.5 26 29.5 32.5 36 49.5 now that you have 14 numbers take away the ones that have decimal points. and according to this list now you should only have                                                  6, 13, 16, 26, 36. If you did it right you should have noticed that those 5 numbers have 4 numbers that have the same last digit take those away.  with this list I am left with 13. that is my third number.

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Article SummaryX

To crack a Master Lock combination lock, download a lost combination form on the Master Lock website. Then, fill out the form and pay to have it notarized. Once you’ve completed the form, mail it to the Master Lock warehouse along with a photo of the lock and the lock’s serial number. After about 4-6 weeks, you should receive the combination to the lock in the mail. To learn how to crack a Master Lock without the serial number, keep reading!

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