The Hitachi 4 1/2in. Angle Grinder removes casting fin, finishes various types of steel, bronze and aluminum materials and castings, grinds welded sections, sections cut by means of an acetylene torch, synthetic resins, slate, brick and marble. Compact and lightweight at 3.1 lbs. for greater control and maneuverability, especially in overhead applications. Wheel Diameter (in.): 4 1/2, Amps: 6, Height (in.): 19.9, Speed (RPM): 10,000, Switch Type: Slide, Spindle Thread Size: 5/8in. - 11, Spindle Lock: Yes, Side Handle: Yes, Variable Speed: No, Wheel Included: Yes, Wrench Included: Yes, Case Included: Yes, Dimensions L x W x H (in.): 5.9 x 16.4 x 19.9 6 Amp motor with 400W of output power for tough grinding jobs Spindle lock for quick and easy disc and accessory changes Trigger lock-on for comfortable, continuous operation Left-mounted side switch with quick-off feature for added safety Removable, forward-canted side handle for improved control and comfort for right and left-handed users Externally accessible carbon brushes Extended-life auto-stop carbon brushes for added motor durability Low-profile gear case to get into the tightest areas Small diameter grip for a comfortable hold