McGard 74039 Marine Propeller Lock Set (3/4"- 16 Thread Size) - Mercury/MerCruiser/OMC - Set of 1 Overall Lock Length - 1.025" 3/4" - 16 Thread Size 1 - 1/16" Hex Size Propeller Locks Set of 1 Lock, 1 Key, 1 Washer and 1 Cap