Neiko 10649A Air-powered Micro Die Grinder, Pencil Style | 54,000 RPM | 1/8" (3mm) Capacity Glides through surfaces with a free air speed of 54,000 RPM and working air pressure of 90 PSI Textured throttle with self-closing lever adjusts speed, speed stays constant until you decide to change it Clean jewelry, dies, rotors, backing plates, brake pads, cylinder heads, mounts and many other applications; suitable for hobby use Lightweight 5-1/4" pencil style shaft offers precision control when cutting, grinding and polishing Average Air Consumption: 1.4 cfm (40 L/m); Air Inlet: 1/4"; Includes flexible nylon hose with protective slip-on shield, two collet wrenches and nipple