Ultra-solid ball knob with a Shiny finish, suitable for general application,such as lawn mowers, exercise equipment, machinery, valves, spigots, etc. Suitable For: handle ball is widely used in machine tools, Arcade Game Joystick,combined machine tools, woodworking machinery and printing, textiles, food, mining, medical equipment, automotive and other fields Feature: Threaded knob, good machine operation handle replacement. Hard plastic, long lifespan. Polished surface, comfortable grip. Specification: Material:Bakelite Threaded material: Iron / Brass / Bakelite Color:Red / Black Thread Size: M4 M5 M6 M8 M10 M12 M16 Diameter: 16mm ~ 50mm.