One of the oldest tricks to securing a guitar strap to the end pin of a guitar was by inserting a rubber washer over the end pin. The D'Addario PadLock cotton strap puts its own spin on this technique by attaching the rubber piece to the strap. No extra parts. No installing hardware. It’s as easy as putting on the strap and pulling the rubber tab over the end pin. The PadLock features a comfortable black cotton design.