Every bump key we make, in one bundle. Lock bumping is one of the most effective and fastest methods for opening pin tumbler locks without the original key. A precision-cut bump key is inserted into the target keyway, then struck with a bump hammer - the brief kinetic energy causes all the pins to jump simultaneously, creating a split-second window to turn the cylinder. The technique rewards good tooling: imprecise keys kill your chance before you start. Our bump keys are precision code cut for superior performance, and this bundle gives you full coverage across the seven most common residential and commercial keyways. What's in the Complete Bump Key Bundle AR1 Bump Key - for Arrow 5-pin cylinders KW1 Bump Key - for Kwikset 5-pin cylinders M1 Bump Key - for Master 3 variant padlock cylinders SC1 Bump Key - for Schlage 5-pin cylinders SC4 Bump Key - for Schlage 6-pin cylinders WR5 Bump Key - for Weiser 5-pin cylinders Y1 Bump Key - for Yale 5-pin cylinders 10 Rebound Rings - rubber washers that reset key position between strikes