Check the listing for details. D'Addario Auto Lock PolyPropylene Guitar Strap Black PWSAL400. Color: Black, Condition: New. Listed at 16.99 USD. D'Addario AUTO LOCK Polypropylene GUITAR STRAP BLACK 2" Wide Guitar Strap with Auto-locking Strap End D’Addario Auto Lock Guitar Strap is a simple integrative strap locking system built for your performance. The latch is spring-loaded, so it automatically clamps down on the strap button and will not release unless desired. The D'Addario Auto Lock Guitar Strap works with most strap buttons on the market. Available in a variety of materials and colors. Designed in collaboration with Ned Steinberger.Designed for players of all genres, D'Addario Polypropylene straps offer designs that will please even the most discerning player 2" polypropylene strap adjustable from 35" to 59. 5" longIntegrated spring-loaded strap lock systemProvides maximum comfort for standing situationsHighly durableA Ned Steinberger design