The 3M Hookit Film Disc 775L 87266 is a 3-inch hook-and-loop disc engineered for fine-finish sanding on metal, composites, and fiberglass. Revolutionary 3M Precision Shaped Grain cuts up to 2x as fast as conventional abrasives while the durable film backing provides greater tear resistance and superior edge retention compared to paper-backed discs. The open-coat construction resists loading during stock removal operations. Hookit attachment provides fast, secure disc changes on 3-inch random orbital and dual-action sanders.
What is the advantage of film backing over paper backing for sanding discs?
Film backing is more tear-resistant and dimensionally stable than paper. It holds its shape at disc edges under sanding pressure, providing better edge retention and a more consistent finish, especially on contoured surfaces like body panels and fiberglass.
Can the 775L be used for wet sanding?
The 775L is designed for dry sanding applications. For wet sanding needs, 3M offers silicon carbide wet/dry sandpaper from the Wetordry line, which is formulated for use with water or cutting compound.
How does Precision Shaped Grain compare to Cubitron II?
Both use 3M's triangular grain technology. Cubitron II is the premium branding for industrial-grade electrostatically oriented triangular grain. The 775L Precision Shaped Grain provides similar faster-cutting benefits in a product positioned for a broader range of sanding applications.
What sanders accept the 3-inch 775L disc?
Any 3-inch random orbital or dual-action sander with a hook-and-loop backing pad is compatible. The Hookit system is common on professional detail sanders and small orbital sanders used in bodywork and composite finishing.
# 3M™ Hookit™ Film Disc 775L, 3 in, 80+ **Model:** `87266` **Brand:** 3M **Category:** Sanding Disc > The 3M Hookit Film Disc 775L 87266 is a 3-inch hook-and-loop disc engineered for fine-finish sanding on metal, composites, and fiberglass. Revolutionary 3M Precision Shaped Grain cuts up to 2x as fast as conventional abrasives while the durable film backing provides greater tear resistance and superior edge retention compared to paper-backed discs. The open-coat construction resists loading during stock removal operations. Hookit attachment provides fast, secure disc changes on 3-inch random orbital and dual-action sanders. ## Specifications | Attribute | Value | |---|---| | Product Type | Sanding Disc | | Diameter In | 3 | | Attachment | Hookit (hook-and-loop) | | Abrasive Type | Precision-Shaped Grain (ceramic) | | Available Grits | 80+ | | Backing | Film | | Dust Holes | Yes | | Barcode (UPC) | | Source: https://www.jaspecs.com/3m/sanding-disc/87266-3m-hookit-film-disc-775l-3in/