The Dunlop Strap Lock System is the strap retainer designed with the artist in mind. 360 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. Set (2 units for instrument and strap) adapts to instrument by replacing existing strap pins / screws with special Strap Lock System buttons / screws. Two strap attachments are included for your strap.
I've used several styles of Straplocks, these are Dunlop's "Dual Design". The design let's you use the strap button without the locking device which is handy if you leave your strap at home. They are easy to install and easy to use. The only design flaw is the length in which they stick out from the body. Make sure your screw holes are not wallowed out and the screws are snug.