Micro-Motor High-Speed Rotary Handpiece System - Foredom K.1070For high speed applications up to 38,000 rpm including light deburring of cast pieces, bright cutting in jewelry making and fine detailing in wood. Kit includes control box, handpiece with 2. 35mm (3 32) or 1 8 collet (depending on choice of collet installed), variable speed foot control, handpiece cradle, spare pair of motor brushes, spare fuse and collet changing wrenches. The control converts AC current to DC current required for the handpiece.