The Ram RX300 is a premium handpiece set that has a very good “torque feedback control” feature. It keeps the handpiece running smoothly when put under a load. The rpm range is 3,000 - 35,000 and it has dynamic braking for quick bur changes. The control box has selection for hand/foot control, selection for forward/reverse, and a setting to make the foot pedal work as an on/off switch. The chuck size is 3/32” and will hold a HP shank bur. Includes handpiece (with stand, tools and brushes), variable speed foot control and control box. Ram has a 6 month warranty on this handpiece. Made in Japan.