HTS 117D0 Variable Speed Rotary Tool With Accessories 8,000 - 30,000 RPM variable speed Accepts bits with a 1/8" / 3.2mm shank (standard Dremel sizing) Removable collet can be replaced to accomodate up to 5/32" shank Operates in 110/230V at 50/60HZ 180W motor for exceptional torque