Classic pre-war elegance coupled with state of the art manufacturing and construction to create an exceptional tuning machine. These are designed to replace most contemporary open gear tuning machines such as Grover®, Schaller®, Wilkinson®, Waverly®, and others using a 26 mm center to center mounting hole pattern. They feature a precision diecast base, brass ring gear, steel worm gear with close tolerance bushings, and 18:1 gear ratio. For solid headstocks with vertical mount.