I bought this product because it was for SDS-200D because I do not know what kind of paper is suitable for purchasing SDS-200D because it is a beginner. Well I can not be quickly torn. I bought a bent part is attached with a second kill. Thunder operation is a beginner, so it was because I did not understand the power adjustment of Thunder operation, but almost unusable was left unchanged almost as brand new. It is not good to thrust the sander strongly to the repair place! Although I got to be able to somewhat endure after I am skilled in adjusting power, I am sure that I know exactly where the paper bends at the time of installation and I want you to reinforce a little more from the beginning. Although it may be commercially available paper, it will not be able to use the function to suck polishing scum. Thank you for your improvement.