.4 hp Straight-Line Die Grinder 30,000 RPM, Gearless, Rear Exhaust, 1/4 Inch & 6 mm Collets, Extended Muffler .4 hp Dynabrade Die Grinders are perfect for use on metal, fiberglass, carbon fiber, composites and more! Dynabrade's .4 hp (298 W) Die Grinders are designed for peak efficiency and longer life! Ideal for rapid material removal, deburring, finishing and polishing, these tools represent the finest in Dynabrade quality and innovation! Integrated Safety-Lock Throttle Lever has a contoured shape for operator comfort, with new dowel-pin that minimizes lever wearIncreased Tool Life due to Unique Pre-Filter that provides extra defense against contaminants in air stream. Governor-Controlled Motor (950 RPM to 30,000 RPM Models) Maintains consistent motor speed under loadColor-coded for easy identificationErgonomic Oval-Shaped Tool Housing conforms to natural shape of hand for optimum comfortLightweight, tool design each model weighs 0.5 oz (15 g) less than its previous version! 3-Vane Rotor allows wider offering of tool speedsAchieves stall-torque and horsepower performance equal to tools with 4-vane rotorInnovative Air Flow Channel Exhaust air moves through channel between composite housing and housing core, maintaining comfortable temperature of tool housing! Hardened Tool Cylinder Tool cylinder is made of case-hardened material, to retain core toughness and prevent crackingFull-Length Housing Core Housing core runs the full length of tool, serving as the backbone and providing consistent weight distribution of toolComfortable Tactile Grip Tools tactile grip is co-molded to composite housing, providing comfortable non-slip gripGearless for reduced maintenance and downtimeCollet Style is 3-PieceIncludes 1/4 Inch Collet Insert (01485) & 6 mm Collet Insert (01497) Product Information Brand Dynabrade Part # 48203 Air Flow 84.0 Air Thread 1/2 Inch NPT Exhaust Type Side Height 6-1/2 Inch Hose ID 1/2 Inch HP 2 Origin Country United States Product Type Die Grinders RPM 30000 Wheel Diameter 7 Inch