We are pleased to carry the finest flat hand sanding blocks available to the woodworker today. Made of extremely heavy rubber, these blocks are the flattest and truest we have found. What that means to you is flat sanding made easy and virtually fool-proof. Use your standard sheet materials, cut them to size, clamp them in with the built-in clamping device and start sanding effortlessly. Two sizes are available so that you can use the one that's right for you.