The Astro Pneumatic 218 1/8-Inch Pencil Type Die Grinder - 56,000rpm is ideal for working in tight spaces. Use for easy cleaning of dies, rotors, brake pads, mounts and many other applications. Lightweight for ease of use. Twist-Action variable speed control includes a 5 foot guarded hose. Wide range of uses includes body shops, fabrication shops, brake shops, industrial shops, die manufacturers, etc. Specifications: Collet Size: 1/8-inch, Free Speed: 56,000rpm, Overall Length: 5-1/4inch (133mm), Net Weight: 1/4-pound (.11kg), Air Inlet Thread NPT: 1/4-Inch, Air Hose I.D. Size: 3/8-inch (10mm), Avg. Air Consumption.: 4cfm, Noise Level: 73~75dB, Vibration level: 0.07m/s2, Air Pressure: 90-120psi, Hose Length: 5-Feet.