3M Rubber Slotted Expander Wheel 77721, 2 in x 2 in 1/4 Diameter ShankGeneral Information Brand 3M Attachment Type Shaft Function Attachment Style Mechanical Attachment Product Type Expander Wheel Country Of Origin United States Sold As Each Lead Time 2 days California Residents Proposition 65 Warning Dimensions and Specifications Maximum Speed 6000 rpm Overall Diameter (Imperial) 2 in Overall Diameter (Metric) 50. 8 mm Overall Width (Imperial) 2 in Overall Width (Metric) 50. 8 mm Shank Size 0. 25 in Width 2. 01 in 5. 1