Compatible machines : The 5inch Hook & Loop Replacement Sander Pad for & fits Model DW420/K, DW421/K, DW422/K, DW423/K, DW426/K, D26450, D26451/K, D26453/K, D26456, BO5010/K, BO5030/K, BO5031/K, BO5041/K. Replacement Pad for 743081-8, 743051-7, 151281-08, DW4388. Sander replacement pad : Hook and loop backing pad for quick abraisve paper changes. Easy screw-on Installation. Attaches easily and hassle-free. NOTICE: the screws are not included. You can use the existing screws on your sander. Product size : 5inch dia, 8 dust holes and 3 screw holes, the distance bewteen screw holes is (1-7/16inch) and the screw holes' dia (9/32inch). High efficiency: the sander pad has 8 holes, working with sander that have dust collection system to vacuum up the dust and debris efficiently. High efficiency: the sander pad has 8 holes, working with sander that have dust collection system to vacuum up the dust and debris efficiently. Better quality : Premmium rubber can reduce vibration from orbital sander for improved results. High-density and uniform hook provide strong stickness. Our pad's backing is thickened and much harder than others. Colour:Blue+black Material:Polyurethane Package Contents: 4 x Sander backing pads Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.