The Studio Pro Grinder is the professional grinder at a hobbyist price. Equipped with 1/4" and 1" Silver Bullet Bits, the Power Max II will grind and shape all your glass pieces accurately and quickly. This powerful 1/8 HP grinder is a popular pick for new-comers, but has the endurance to keep up with serious glass artisans. Features the Super Sponge water cooling system and a 9-1/2" x 9-1/2" easy glide work surface and a light. Six year manufacturer warranty -- the longest in the industry on a grinder. Specifications: Maximum Horsepower: 1/8 HP Motor Type: Permanent Motor AC Motor RPM: 2300 RPM Motor Torque: .42 N.m Watts: 150 Shaft: 1" H x 5/16" Diam. Stainless Steel Size: 10 5/8" W x 10 5/8" D x 7.5" H