Tubular Key Switch Lock Momentary Spring return model CRC25 Turn 90 degree clockwise to close contacts, let it go and spring will return key to original position (acts similarly to ignition switch) Each lock comes with 2 keys and mounting nut only, pictured Washer not included. Thread diameter about 3/4" (19mm) thread length 1-1/4" (31mm). Overall length 2" including pins. Pin connectors are 1/8 in outer diameter. All keys are different and won't fit the other locks.