The Diamond Abrasive Resin Sanding Belts for Expanding Drum Wheels are designed to provide a smooth finish, especially when working with stones. These belts are resin bonded, which contributes to their longevity and durability. According to feedback from professional users, these belts are reported to be the longest lasting they have ever used. Under normal use, these belts can last 50 to 100 times longer than belts made with silicon carbide abrasives. There are three different sizes available: 6"x1.5" Diamond Resin Sanding Belt: This belt has a width of 1.5 inches and a length of 18-15/16 inches. It is suitable for use with a 6"x1.5" Expandable Rubber Drum. 6"x2.5" Diamond Resin Sanding Belt: This belt has a width of 2.5 inches and a length of 18-15/16 inches. It is designed to fit a 6"x2.5" Expandable Rubber Drum. 8"x3" Diamond Resin Sanding Belt: This belt is wider, with a width of 3 inches, and has a length of 25-7/32 inches. It is specifically made for an 8"x3" Expandable Rubber Drum. These belts are backed by a 100% satisfaction guarantee, ensuring that customers are satisfied with their performance.