Today we're going to be taking a look at part number RC2SS. This is the stainless steel trailer coupler lock from Deadbolt. It's going to feature a half inch span; that's just the distance right here in the middle. It's the usable amount of pin length that we have. The stainless steel coupler lock is for tab style trailer couplers. The pin diameter's going to measure a quarter of an inch.… see more >