.3 HP 1/4" Mini Die Grinder (402109) Quality advances for longer service life include: steel end plate inserts, brass collar, reinforced air inlet and cylinder made of higher quality steel Mini length housing for use in confined areas All ball bearing construction and lever throttle with roller for positive speed control Self-locking throttle lever prevents accidental starting of motor Rear exhaust Built-in air regulator Ideal for multitude of applications using a wide range of accessories Standard Accessories: Wrenches, 1/8" collet Specifications: Product Weight (lb/kg) 0.85 lb (0.38 kg) Collet Size 1/4" Free Speed (RPM) 25,000 Overall Length 6-3/16" Avg. Air Comsumption (cfm) 4 Min. Hose Size 3/8" Air Inlet (NPT) 1/4" Sound Pressure (dBA) 90 Vibration (m/s²) 2.5 * All Pictures Shown Are For Illustration Purpose Only. Actual Product May Vary Due To Product Enhancement.