Features and Benefits:Burrs easily changeable with our new spindle lock system;0.56 hp motor;Free speed of 22,000 rpm's;Built-in air regulator;Swivel air inlet;Less heat transfer between the motor and the sleeve due to new composite housing;TPR rubber grip for better handling;High durability with no brakes or damage after 2,000 test cycles;Total kit weighs 3.54 lbs. Kit includes: CP7411 Die Grinder, 3mm and 6mm collets, (5) 6mm mounted points, (5) 3mm mounted points, Spanner wrench, and Blow molded case.;Our CP74 Series Die Grinders make changing a carbide burr easier than ever with our new spindle lock system that requires only one wrench to complete the process. We have also increased the power over the previous generation and provided a new design for better handling and less heat transfer between the motor and sleeve.