The Milwaukee 7"/9" 15.0 Amp Large Angle Grinder w/Lock-on delivers performance and durability for the most difficult grinding jobs. The 15 Amp, 4.2 HP motor provides high overload protection and power for the toughest jobs. The tool-free burst resistant guard allows the user to quickly adjust the guard without the use of a tool. Both a 7" and 9" Type 27 grinding guard are included for greater productivity. Also availble with Non Lock-On. 15.0 Amp, 4.2 HP Motor -high overload protection and power for difficult applications 6,000 RPM- optimal wheel speed for material removal Debris Baffles- protect internal components by deflecting damaging debris out of the airflow at the intake vents External Brush Doors- reduces service time by providing easy access to brushes Soft-Grip Main Handle-provides better control and comfort Tool Free, Burst Resistant Guard-quickly adjust the guard without a tool 7" & 9" Type 27 Guard Included-for added productivity Compatible with multiple Grinder Guards and Flanges. See cross-reference guide below.