Fits: DeWalt D26451 5"/8 Hole Orbital Sander. Fits perfectly! I simply loosened the three very tight screws holding the old worn pad in place, removed that old pad and put it back in. The screws require a T-20 torx screwdriver OR a flathead screwdriver to drive and loosen them; It's hard to see the shallow notch in the screw head until you remove it. It couldn't be easier The velcro on the new pad holds my sanding discs just as securely as the original pad, and the foam pad feels stiffer and more durable than the original pad.Now I'm ready to continue my project.