Oregon Chain Sharpener Replacement Grinding Wheel - 1/8in. Thickness, For 1/4in., .325in.-Pitch (33, 34, 35 Series Chains Only), Mini 3/8in.-Pitch (90, 91 Series Chains Only)
For 1/4in.-pitch, .325in.-pitch (33, 34, 35 series chains only), mini 3/8in.-pitch (90, 91 series chains only) * 7/8in. shaft diameter * 1/8in. wheel thickness