Anwenk Premium Guitar Strap Locks and Buttons Security Quick Release Straplocks Strap Retainer System Nickel (Pack of 2) Premium guitar straplocks adapter to your instrument by replacing existing strap pins/screws with a special straplock system. Quick Release by pulling out the straplock button to release/ install. Works perfectly for your electric, bass and acoustic guitars. Material: Nickel Net weight:2.11oz(2 set).