Crack Any 3-Digit Combination Lock with These Simple Steps

Cracking any 3-digit combination lock can seem like a daunting task, but with the right approach and a bit of patience, it’s entirely possible. This guide will walk you through the process, providing you with practical advice and real-life examples to help you understand the process better.

Understanding Combination Locks

A combination lock, such as a bike lock, typically has three or more dials with a keyhole through the center of them. To unlock it, you need to align the correct combination of numbers with a specific marker line on the lock.

What You’ll Need

To crack your combination lock, you’ll need a length of cord or rope around 30cm long and the combination lock that you wish to unlock. The rope will be threaded through the loop on the lock and folded in half around the shackle.

The Trial-and-Error Technique

One of the most straightforward methods to crack a 3-digit combination lock is the trial-and-error technique. This method involves manually inputting every possible number combination until you find the correct one.


  1. Start with “000” and pull down on the shackle to see if it unlocks.
  2. If it doesn’t work, move on to “001”, then “002”, and so on until you reach “999”.
  3. If none of these combinations work, try moving on in increments of five (“005”, “010”, etc.) until you reach “995”.
  4. Once you get close to your target number (e.g., your locker’s last known combo), start increasing or decreasing by one each time.

This method requires no special tools, just some patience. However, it can be time-consuming and may attract unwanted attention if used in public places like gyms.

Using Automated Tools

If the trial-and-error technique seems too tedious, you can also use automated tools to open a locked three-digit lock quickly.


  1. Purchase an automatic tool such as a padlock shim or bolt cutter.
  2. Insert the tool into the shackle hole and release tension from the locking mechanism using gentle pressure.
  3. Turn clockwise or anticlockwise depending upon the lock to open it without damaging it.

This method is quicker than the trial-and-error technique when successful and can work on damaged locks where the trial-and-error technique will not work. However, it can be potentially dangerous or illegal in certain circumstances and may damage your lock, rendering it useless afterwards.


Cracking a three-digit combination lock is not an impossible task. However, we recommend you contact the manufacturer of the lock to provide assistance if possible or explain why the locking mechanism may have gone wrong next time. We hope this guide has provided useful information on how one can open their 3 digit combination lock and avoid any panic situations caused by losing keys or forgetting combinations!


  1. Is it legal to use these steps to crack a combination lock that doesn’t belong to me? No, it is not legal to break into somebody else’s property. These steps are intended for educational purposes only and should never be used illegally.
  2. What if the combination lock has more than three digits? Can I still use these steps? No, these steps specifically apply to 3-digit combination locks. If you have a different type of lock or a lock with more than three digits, this method may not work.
  3. Can I use this method on any brand of 3-digit combination lock? This method applies primarily to simple 3-digit combination locks. It may not work on more complex or higher-end brands of locks that have additional security features built in. Additionally, some locks may have unique designs or mechanisms that make them resistant to this specific method of cracking.