Kwikset Smart Key Reset & Decoder Cube (LT-D-R) LockTech's "KW1 Cube" was designed to reset or decode KW1 Smart Key cylinders when no key is available. Depending on the scenario, sometimes simply resetting as Smart key lock to a known key is the most efficient option; however, there are also times when decoding the lock in hand can save a lot of time when there are other locks on the job site that use the same key bitting.