Convex hand sanding block available in two sizes. Uses standard roll/sheet sandpaper, just cut to the desired size and clamp into the sanding block with the thumb wheel clamp. Size of contact point can be adjusted by holding the block at an angle. Sizes available approx: Small 110mm x 40mm. Medium 110mm x 50mm. Convex sanding block kit only sandpaper not supplied., Manufacturer: Jabtek Limited