Tim Holtz Cling Mount Stamps - Crazy Dogs by Tim Holtz Tim Holtz Cling Mount Stamps: Crazy Dogs. Every dog has his day! Ten deeply etched red rubber cling mount rubber stamps that adhere to any clear acrylic block. We highly recommend using them with Tim Holtz Grid-Blocks. Crazy dog (upper right) measures approximately 1 7/8" x 2 7/8". Stamps come on a 3-hole punched sheet for easy storage.