A well-trained lock picker (including criminals) can release pins at the shear line by tapping each pin up with a diamond pointed pick as he turns the keyway with a tension wrench. You can also use a bump key ground down to the lowest setting, carefully whacked into the keyway. Bumping flings the pins up in the air long enough for the key to twist and catch the pins when they come down, allowing the cylinder's plug to turn.
Locks were made to keep bad people out. But that doesn't mean the good ones can't enjoy picking them. There are people that use a small sheet of plastic or a credit card to open the doors in offices, hotels, and school which helped more than a few desperate neighbors, friends, office mates to get back in. The more you understand locks, the easier it is to choose the right one for your situation.
Here are a few type of locks:
Pin Tumbler
Combination Lock
Tubular Lock
Warded Lock
Of all these kinds of locks you still can’t rely on them to keep you and your family safe. You will need to utilize other tools and tactics and create multiple layers of security in order to achieve a real peace of mind. If you’ve ever been locked out of your house or car, you know how annoying it is to be standing there like a chump, while you don’t know what to do. At this point your only option would be to contact a professional Locksmith.