Patented rollers help eliminate tuning problems and reduce string breakage.
Mounting screws included.
Pilot holes required: Installing delicate screws such as these into hard maple requires great care and accuracy. We highly recommend using a 5/64" bit for the pilot hole before installing these screws. Lubricate the screw threads with cutting lubricant (also wax or a bar of soap) to reduce friction and help them thread properly.