The Lishi tool is a combination picking, tensioning, and decoding tool all in one.  The graduated lines on the side of the tool make pick tip placement as easy as it gets.  Once a lock is opened, the Lishi tool can be used to quickly decode the bitting values of the key that would open the lock.  Product comes with the tool, a hex key for tightening the collar, and a case. This Lishi variant fits in the M1/MS2 (4 Pin) keyway commonly found on padlocks made by Master Lock and several other companies. Masterlock M1 Keyway Return Policy: Lishis are only able to be returned if they are unused. These tools are all inspected before being shipped to the end user for quality assurance. Lishis are precision tools and if used with too much force they can easily bend the picking arm. If a picking tip is bent or broken in use, the tool is not eligible for a refund or replacement. A photograph will be required for all exchanges or returns and they will be examined before returns are processed.