The 4-1/2 Inch Angle Grinder (G12SE3Q9) with Lock-off paddle switch is compact and powerful offering an exceptional price-performance value. It has the power and speed needed to debur diecast products, finish iron, bronze, aluminum, welds and torch cut surfaces.It can also be used to cut soft steel materials as well as grooving and cutting concrete and other stone materials. Improves your productivity with a tool less and twist free guard system that allows you to change the guard position without having to remove it. Improves your productivity with housing that prevents entry of metal dust, reducing the risk of short circuits. Comfortable to use and control, especially for extended periods of time. Safe to use with its not locking paddle switch.