3M Roloc Disc, 361F, P240, 1 1/2 in (38.1 mm) The 3M Roloc Disc 361F offers a quick-change attachment and provides durability and high performance for grinding, blending, deburring, and finishing on all metalsFast-cutting aluminum oxide abrasive grains are bonded to the heavyweight cloth backing with durable, heat-resistant resin that supports both wet and dry applications. Product Information Brand 3M Part # 7100066673 Backing Material Cloth Diameter 1-1/2 Inch Grit 240 Material 361F Mineral Aluminum Oxide Origin Country USA Product Type Quickchange Discs Product Information3M Roloc Attachment enables efficient and secure installation and removal of the discDiscs can be used in wet or dry applicationsHeat-resistant resin coating bonds abrasive to backing for durability under pressure, heat, and waterTough YF-weight, polyester backing supports medium-pressure applications and provides consistent performance