Today we're going to be take a look at part number RC6SS. This is the Deadbolt stainless steel trailer coupler lock. It's going to feature a pin diameter of 1/4". The Deadbolt receiver-style lock has a flush-mount design. It's going to feature a covered key slot that's going to help keep out any dirt, dust, or moisture from gaining access into the lock core, which ultimately is going to keep out… see more >