Compatible machines : The 5inch Hook and Loop Replacement Sander Pad for and fits Model DW420 or K, DW421 or K, DW422 or K, DW423 or K, DW426 or K, D26450, D26451 or K, D26453 or K, D26456, BO5010 or K, BO5030 or K, BO5031 or K, BO5041 or 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 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 or 16inch) and the screw holes' dia (9 or 32inch). High efficiency: the sander pad has 8 holes, working with sander that have dust system to vacuum up the dust and debris efficiently. High efficiency: the sander pad has 8 holes, working with sander that have dust 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 strong stickness. pad's backing is thickened and much harder than others. Colour:Blueandblack Material:Polyurethane Package Contents: 2 x Sander backing pads Only the above package content, other products are not included. Note: Light 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.