The filed blank is inserted into the lock, and then tapped with a special lock bumping hammer at the same time the key is being turned. The tapping from the bump hammer jostles the pins and allows you to turn the lock as the pins line up with the shear line. This is a hard concept to explain with words, so we’ve linked to the following video to provide some clarification.
According to LockBumping.org bumping locks originated in the 1970’s in Denmark. The use of a bump key was not introduced until some time later and was first recognized as a potential home security or lock security issue around 2002-2003 in Europe. LockBumping.org is a great resource for continuing your lock bumping education.
You can use anything from a hammer to a screwdriver handle to bump a lock, but there are also specialized lock bumping hammers available like the one used in the video above. Here’s one that’s available from 215Gear, but unfortunately it doesn’t have a picture.
We’ll be continuing with more about Lock Bumping along with more Lock Picking in future articles!
These lock picking tips and techniques provided in this article are only to be used in accordance with all local, state, and federal laws and provided for lock sport (recreational lock picking) use only. Lock sport should be used to learn about the illusion of security, and how to properly protect yourself and your possessions. Don’t do anything illegal.