Milwaukee 6154-20 4-1/2-Inch 12 Amp Sander/Grinder with Lock-On and Dial Speed Feature 4-1/2-inch sander/grinder with a powerful 12 amp motor Lock-on button for constant operation and dial speed control for real precision All ball and roller bearing construction; double-insulated with a 2-prong cord; spiral bevel gears Includes guard, grinding wheel, spanner wrench, and side handle Tool is 14 inches long; weighs 7.25 pounds shipped; 1-year limited warranty