Scotch-Brite Diamond Wheel 645DC, 125 Mic, 4 in x 1/2 in x 1/4 inGeneral Information Brand Scotch Brite Wheel Type Non Pertinent Country Of Origin United States Sold As Case California Residents Proposition 65 Warning Return Policy NCNR Non Cancellable Non Returnable Dimensions and Specifications Center Hole Diameter (Imperial) 0. 25 in Center Hole Diameter (Metric) 6 mm Overall Diameter (Imperial) 4 in Overall Diameter (Metric) 101. 6 mm Overall Thickness (Imperial) 0. 5 in Overall Thickness (Metric) 12. 7 mm