Just like the title says, learn how to crack a master lock. Not pick the lock (picking a master lock will not get you the combo). You don't need any special tools to crack this master lock- all you need is the right technique. Crack master locks for fun only - don't use this for illegal purposes. Great trick if you lose your combination to your master lock. All you need is a little math. Learn how to hack a master lock with this lock cracking tutorial.