3M Disc Pad Holder 914, 4 in x 1/8 in x 3/8 in 1/2-13 internallGeneral Information Brand 3M Abrasive Attachment Type Hook & Loop Function Attachment Style Hook & Loop, Non Woven Abrasives Hook Type 7 Product Type Back up Pad Type Regular Country Of Origin United States Sold As Each California Residents Proposition 65 Warning Dimensions and Specifications Center Hole Diameter (Imperial) 0. 375 in Center Hole Diameter (Metric) 9. 525 mm Overall Diameter (Imperial) 4 in Overall Diameter (Metric) 101. 6 mm Overall