25,000 RPM no-load motor provides high power and speed for all 1 1/2in. grinding applications. AC/DC capacity works off welding machines and generators for increased productivity and versatility. Grinder has precision 1/4in. collet with 1/8in. reducing sleeve to securely hold all accessories.Wheel Diameter: 1 1/2 in.Amps: 3 .Speed :25,000 rpm.Switch Type: Paddle switch with lock-on button .Spindle Thread Size: 1/8in. - 1/4in. collet .Side Handle: No .Variable Speed: No .Wheel Included: No .Wrench Included: Yes .Case Included: No .