The Shark medium maroon surface preparation discs are shipped in a clam shell-Package with 10 discs per-Pack. The 3-Inch medium discs are compatible with all major brand holders with the twist-lock button system. These long life discs are guaranteed to perform as good or better than other leading brands. The buttons are affixed to the holder by spin-welding; which guarantees you the best results. These noticeably thicker discs will not disappoint the user with their great performance.