Xtremepowerus 3600rpm Professional Workbench or Wall Mount Electric Chainsaw Sharpener W/ Lamp Chain Pitch (in.): 1/43/4 Bore Diameter (in.): 7/8 Wheel Diameter (in.): 5 11/16 Included: (1) Chain saw sharpener (2) Grinding wheels (1) Pitch template (1) Wheel dressing brick (1) Ligh bulb