Technique Tuesday Clear Blocks are specially designed to make stamping easier. Our blocks are the product of a sophisticated manufacturing process that achieves a completely clear finish. Our clear blocks are smooth on all corners with no sharp points, jagged edges, or rough saw cuts that irritate your fingers. Our premium blocks are a full ¾ of an inch thick so they are easier to grasp and comfortable to hold for a more accurate and enjoyable stamping experience. We also offer economical ½-inch-thick blocks in a variety pack.