This sanding block will quickly become one of your favorite tool in the workshop. Great for hobbyist and professionals. The curved sides of the block will fit your hand, making for an easy and comfortable grip. The Perma-Grit line of sanding blocks can save you hundreds on sandpaper over their lifetime. What is there lifetime? I don't know, I've never worn one out! Perma-Grit Tools will cut:- All Woods, Glass Fibre, Carbon Fibre, Kevlar, Plexiglas, Lexan, Perspex, Acrylics, Plastics, Polystyrene, Brass, Copper, Aluminium, Ceramics, Stone, Horn, Antler etc.