The Big Horn 19520 is a Sand Devil Sanding Block. Made of tough, injection-molded thermoplastic, this patented sanding tool makes it easy to change standard 3 Inch by 21 Inch abrasive belts quickly. With its multi-surface design, Sand Devil provides easy access to flat, curved, and angled surfaces, including difficult to reach corners and edges. Features: Ideal for homeowners and do-it-yourselfer's Works on flat, angled, and curved surfaces Essential for every workbench or toolbox What's In the Box: Big Horn 19520 Sand Devil Sanding Block