The Dunlop Straplok® System is the strap retainer designed with the artist in mind. 360º groove and ball design allows the unit to rotate without catching. The case hardened steel skin guarantees long life. The same strap can be used with several guitars, as the strap button is interchangeable. Release tested up to 800 lbs. of pull. It will not come loose. Original Slim button design set (2 units for instrument and strap) adapts to instrument by replacing existing strap pins / screws with specia