Set includes: diamond compound stick (white), tripoli compound stick (brown) emery compound stick (black). Maximum speed 4000rpm.Emery stick (black): cutting compound for use on copper, brass, aluminium, steel, stainless steel, nickel & iron.Diamond compound stick (white): extra-fine dry compound for use on chromium, stainless steel, carbon steel, brass & aluminium.Tripoli compound stick (brown): cutting compound for use on copper, brass & aluminium.Round buff 75mm diameter; tapered buff 50mm x 50mm.