Anwenk Guitar Strap Locks Premium Guitar Straplocks Security Quick Release Strap Locks Strap Retainer System,-Matt Black (Pack of 2) Premium guitar strap locks 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. Matt Black Net weight:2.11oz(2 set). 100% lifetime satisfaction guaranteed.