I don't know if your refering to the sanding disks or not but I am going on experience here that the sanding pad which is screwed on the tool that allows you to put hook and loop sanding disks on it. If your not able to but sanding disks on the pad then your sanding pad is worn and can be replaced for $20 which I am getting pretty close to having to replace mine but I had my sander for quite awhile and never had a problem like that. It's just my sanding pad is tearing on the upper part now to replace it I will have to get back to you on that. I heard it's really simple by taking the screws that is in the sanding pad out and then it comes right off i just have not done it myself. Finding the part is easy go to Dewalt.com then hit what country after that, go to parts and information tab now from there you will find what you need on the second coumn on the right hand side in the small print you will find where to find parts by clicking on the find parts on service net.