11 Amp,27,500 RPM motor produces peak 1-3/4 HP. 1/4", 3/8" & 1/2" bit capacity. Solid aluminum motor housing & base. Micrometer depth adjustor accurate to 1/128". Dust-sealed switch & sealed ball bearings. Replaceable glass-smooth, non-marring base. Includes motor, base, 1/4" & 1/2" collets, collet wrenches, operating manual