Check the listing for details. Adjustable DeadBolt Coupler Lock - Keyed Alike, Sold Each (RC-1-KA). Condition: New. Listed at 26.82 USD. Product DetailsAdjustable Trailer Coupler Latch Lock. An all new design that fits a wide variety of lever style couples with five locking positions from 1/2" to 2-1/2". Swivel head side entry lock housing uses our standard double entry automotive style key for easy, convenient use. Exclusive conical housing and knob design allows close fit to coupler side walls. All weather grips. Weather proof sealed lock housing. Up to 10 locks can be purchased with keys the same.Up to 10 locks can be purchased keyed alike FeaturesSide entry key accessInside Width: Adjustable from 1/2" to 2-1/2"Overall Length: 4-1/2"1/4 turn locking mechanism; 5-pin tumbler; 2 keysDouble nickel chrome finish lock housingFits couplers with 9/32" diameter hole