Zinc alloy made streamlined body, stainless steel lock button cover, with great electroplate finish, easy to install,easy to replace your old or dirty guitar tuning pegsFits Strat/Tele style and other similar style electric guitar, Please check your old tuners size before you buyGear ratio 18:1, the retaining mechanism lock the strings in place, preventing them from slipping, improve tuning stability and make string changes much faster, turn smoothly and precisely, locking tuners keep your guitar stays in tuneFits the modern standard 10mm(25/64 inch) headstock peg holes and 45 degree fixing tagPackage included: 6 pieces guitar locking tuning machines (6 for Right handed) and mounting accessories