This listing is for one new bench mount chainsaw chain sharpener. This unit can be mounted to bench or wall for best results when sharpening chain. Sharpens saw chain from small 1/4”, 3/8 LP, .325 and full 3/8” pitch using a 120V, 60Hz motor spinning at 4600 RPM. Includes two 4” wheels, for small and large chain. Aluminum Base. Compare to Oregon® # 310-120 sharpener. Compact size takes up less space, ideal for occasional use or limited bench space. Fixed motor angle provided consistent grinding. One-way motor for improved operator safety with safety guard to help protect from injury. Includes (2) 4 1/8" grinding wheels (1/8" & 3/16")  Sharpens 3/8 LP, .325 using 1/8" wheel and 3/8 chain using 3/16 wheel. Superior design to many other low cost sharpeners. When comparing our unit to other listings for less money take notice to the base, ours is metal not plastic ! If you have any questions please let us know.