Bass guitars have weighty machine heads and by their very nature have always suffered from "neck-dive". With the advent of 5 and 6 string basses, this tendency became still more acute, making long sessions uncomfortable for the musician. The RES-O-LITE series was developed to solve this problem. By chiefly using the special alloy "duralumin", excellent weight savings are achieved. By use of the Rock-Solid mechanism the GB350 transmits string movement more powerfully, whilst retaining tuning and giving a smooth winding experience made to pre-CBS Fender specs and mounting pattern.-Gear Ratio = 28:1Post Height: 1.21 in.-Post Diameter: .55 in.-Bushing Outer Diameter: .637 in.-Bushing Inner Diameter: .565 in.