CURT Right-Angle Trailer Lock Set, 5/8-Inch Pin for 2-Inch Receiver, 1/4 x 3-Inch Coupler Span Model 23505CURT Right Angle Trailer Lock Set, 5 8 Inch Pin for 2 Inch Receiver, 1 4 x 3 Inch Coupler Span Model 23505 Make your tow vehicle and trailer more secure by keeping them locked up tight with a CURT hitch lock and coupler lock. Like a hitch pin and clip, a hitch lock is designed to insert into the fastener hole in the side of a receiver tube in order to hold a ball mount or hitch mounted accessory in place. While a CURT hitch pin does offer sufficient