The Metabo 4-1/2" 11.0 Amp Angle Grinder with Non-Locking Paddle Switch (603624420) is German engineered and manufactured for durability, safety, and productivity in a broad range of industrial grinding, cutting, beveling, deburring, brushing, and finishing applications. The powerful LongLife 11.0 Amp, AC/DC, 11,000 RPM motor delivers up to 50% more torque for faster material removal and up to 20% higher overload capacity for ultimate durability. The patented motor includes an unobstructed rear air intake, optimized internal air flow, and epoxy coated copper windings that extend outside of the field coil for advanced heat dissipation and protection from abrasion. In addition, the winding protection grid extends the life of the armature up to 5 times in harsh environments. The patented Metabo S-Automatic mechanical safety slip clutch reduces the likelihood of kickback by helping you maintain control if the accessory jams. The M-Quick system gives you the fastest tool-free disc change at the touch of the large spindle lock button. The tool features a tool-free adjustable guard for convenient positioning and safety when grinding and cutting. The die-cast aluminum gear housing is designed to dissipate heat from the motor, features oversized bearings and heavy duty gearing, and is rotatable to allow for multiple switch positions.