Precision 16:1 gear ratio, sealed lubrication, cast housings and removable metal knobs. 10mm (13/32")-diameter pegholes required.
Mounting screws and threaded hex bushings are included.
Mounting screws: Pilot holes required. Installing delicate screws into hard wood requires great care and accuracy. We highly recommend the #1711 Depth-stop Drill Bit (No.50 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.