Durable film construction provides the tear resistance needed for the use of coarse grades in high production metalworking environments, particularly where edge wear is a concern. 3M™ Hookit™ Film Disc 375L is suitable for a variety of applications. When the goal is a superior wood finish, the 375L film disc in medium grades conforms well to the contours and rounded edges of challenging work surfaces to deliver a superior finish. Woodworking applications are further enhanced by a load resistant coating and open coat construction, which reduce clogging and extend the life of the abrasive. For pre and post paint finishing, versatility is key, and the 375L film disc in fine grades is designed to deliver a superb uniform finish on plastics and clear coat technologies commonly used in the transportation industry. 3M™ Hookit™ Film Disc 375L is designed for use with a random orbital sander and the 3M™ Hookit™ backup pad (sold separately). It comes in a range of grades for various applications from rough sanding to very fine finishing. Hook and loop style 3M™ Hookit™ discs are ideal for work spaces where adhesive backed discs may become contaminated by dust, dirt, or flying debris. They are often used in applications where a 3M™ Stikit™ disc may be too aggressive, as Hookit discs tend to leave finer finishes than adhesive backed discs. Hookit sanding discs conveniently and firmly attach to a hook and loop backup disc pad (sold separately) on a random orbital sander, can be removed cleanly and easily, and can be re used again and again for the extent of the abrasive life. Hookit discs provide optimal performance when paired with a 3M™ Hookit™ disc pad. Film backed discs have excellent tear resistant properties and provide a very uniform finish and consistent results with each use. This makes them an excellent option when working on paint, e coats, primers, gel coats, glass, acrylics and solid surface material, wood topcoats and anywhere else a perfect finish is needed. Aluminum oxide is a popular choice among industrial professionals because of its fast cut rate and long life. This mineral makes a tough, durable abrasive that self fractures to expose fresh cutting edges, whereas traditional natural abrasives dull more quickly. Due to its fast cut rate, hardness, and strength, it is widely used in grinding applications in addition to sanding and finishing applications. Aluminum oxide is suitable for a wide variety of materials in both woodworking and metalworking, including ferrous alloys.