A sanding block is a block used to hold sandpaper. In its simplest form, it is a block of wood or cork with one smooth flat side. Sanding blocks are also known as "Saracen blocks" in some construction fields. The user wraps the sandpaper around the block, and holds it in place (by inserting a fitted piece of cardboard under the sandpaper, one can soften the impact on the wood and protect against tears or uneven wear on the sandpaper)