Diamond flywheels are used with flexible shaft machines and micromotors to create mirror bright designs on all kinds of jewelry and art objects. When using these bits, a minimum required rpm is 30,000. So standard flex shaft machines need the boost provided by the High Speed Handpiece. The carbide flywheels, listed below is for use with practice cuts. Serrated carbides are for texture. Diamond and carbide flywheels of unusual angles are available upon request.