3MT Easy Change Floor Surfacing Discs feature a Hook-It II backing for easy changes and better grip on buffer pad. Discs are sharp, fast cutting, tough, and have a flexible paper backing, while offering a better value, better finish, and long life. 3M (EC12X18-120) Easy Change Floor Surfacing Sheets EC12x18-120, 12 in x 18 in. WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer.