1 set of 4 precision code cut bump keys used for opening the most common pin and spring locks. Key types in this set include:

• 1 ea. KW1: Mostly Residential and some Commercial locks.
• 1 ea. SC1: Commercial and Residential applications
• 1 ea. Y1: Commercial applications
• 1 ea. M1: Common Master Lock padlock

NOTE: Bump keys are ineffective on locks designed to be ‘bump-resistant’ or on lock types which may be rekeyed without dis-assembly.

Also, see High-Quality Bump Key Rings on Zippylocks.com. These rings will bounce the key automatically back into position for the next strike.