Genuine Fender American Standard Guitar Tuning Machines in chrome finish have been used on American Standard and American Professional series Strats and Teles for decades. Their smooth 14:1 tuning ratio allow the player for precise tuning. The staggered height between the 2 Lowest strings and the others ensure better performance and tuning stability. Two guide-posts and a screw in bushing allow for quick and easy installation for many USA and Mexico manufactured guitars. Not recommended for vintage instruments. Package includes 6 staggered chrome, enclosed individual tuners, and screw-in top mount bushings and top mount washers. Fender part: 099-0820-100