Rock-a-Block 4pk by Crafter's Companion. These Rock-a-blocks from Crafter's Companion come packaged in a set of four and will work perfectly with all your unmounted rubber or acrylic stamps. Stamps need to be temporarily adhered to the rock-a-block with a spray adhesive. They allow you to give even pressure to your stamping with no bleeding or smudging. They feature an innovative and unique stamp mounting system designed to make stamping easy and to ensure you get perfect results every time. The new Rock-a-blocks are designed to work using a combination of the rocking action, coupled with the innovative depth gauge (the ‘runners’) to give even pressure to the application of ink to the surface to give you perfect stamped impressions every time. These Rock-a-blocks come packaged in a set of four to accomodate a range of stamp sizes : 6" x 4", 6" x 1 1/4" 4" x 3" 1 1/2" x 1"