The Dunlop Straplok system is the strap retainer designed with the artist in mind. Its 360º groove and ball design allows the unit to rotate without catching. Case-hardened steel skin s long life. Interchangeable strap buttons allow the same strap tobe used with several guitars. Release-tested up to 800lbs. Of pull, Dunlop Straplok buttons will not come loose under normal playing conditions.