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Avocet ABS High Security Door Locks

Bumping... What is Lock Bumping

Lock Bumping History
In the 1970's, locksmiths in Denmark shared a technique for knocking or bumping on a lock cylinder while applying slight pressure to the back of the lock plug.

When the pins jump inside the lock cylinder, the plug is able to slide out freely and disassemble the lock quickly. 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. Now lock bumping keys are sweeping the internet and UK homes.

This shows a lock being bumped that has
Lock Bumping Solution added!
Lock bumping keys are used most often with a pin tumbler type of lock. In this type of lock, an outer casing has a cylindrical hole in which the plug is housed. To open the lock, the plug must rotate. A lock bumping hammer pushes the key in and the pins jump up for a split second so that the plug can turn and the lock is opened. This is lock bumping!

The bump key has a distinct look to it. Lock bumping keys are filed down to create little metal spikes which look like shark teeth on the key. When the key is whacked or hit by the lock bumping hammer it then pushes up all the pins at the same time for a split second. When pressure is applied for this split second all the pins are above the tumbler which enables the tumbler to then turn. The hitting or banging of the key with a lock bumping hammer is where the term "lock bumping" comes from.

Lock Bumping keys are used legitimately by locksmiths and therefore legally available. In the hands of thieves they can be used as master keys to open any number of locks quickly and with minor disturbance. Bump keys will open almost any cylinder lock in the country and as around 68% of all homes are filled with the cylinder locks chances are thieves can get into your home.

Yorkshire Evening Post
Ruthless Gang Burgle 38 Homes by Snapping Lock on uPVC Doors

Yorkshire Evening Post
Last Year 320 Homes in Kirklees have been targeted by thieves snapping Euro-profile style lock on uPVC doors

West Yorkshire Police
20% of house burglaries within the Kirklees Division have been committed by the offenders snapping the Euro-profile lock
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