Oregon Chainsaw Chain Sharpener 1 4in. Chain Size, 120 Volt, Model- 108181 High torque grinder quickly sharpens 1/4in., .325in. and 3/8in. pitch saw chains. Cam lever chain clamp holds chain steady. 60 Hz electric motor operates on 120 Volts and draws 85 Watts. 5000 RPM max. speed. Comes with one 3/16in. grinding wheel. 5/8in. Bore Model: Midi Jolly Uses 7/8in. Bore Grinding Wheels Cam Lever Chain Clamp More Info - Click Here To Order