Modern look and performance We started with one of the world’s most popular modern tuners and made them better—we improved the gear ratio, made the plating more durable, and added a super smooth turning gear. These tuners are rock-solid with no backlash and they'll reliably keep you in tune gig after gig. Rock-solid reliability If you're a fan of Schaller, Grover, and Gotoh precision-made tuners, you'll instantly feel right at home tuning up with these. These are lighter and less bulky than Grover's or Schaller's, and far less expensive for a pro-quality tuning machine. High end features and great price: Precision 18:1 ratio Smooth oval knob Sealed lubrication Cast housing Removable metal knobs Included mounting screws and threaded hex bushings Set of 6: For 6-in-line pegheads. 10mm (13/32") diameter pegholes required. Installation Tips Mounting screws: Pilot holes required. Installing delicate screws into hard wood requires great care and accuracy. We highly recommend a No.50/0.0700”/1.78mm for the pilot hole before installing these screws. Lubricate the screw threads with cutting lubricant (wax or a bar of soap works too) to reduce friction and help them thread properly.