Cover-a-Card Cogs Stamp. Cling backed deeply etched red rubber stamp, 5.75 inch square, designed to cover an entire card with one stamping. Just peel the protective backing off the cushion and stick to any acrylic block, such as the Mega Mount acrylic block (can also be used without a block). These stamps are perfect for mixed media art, art journaling, card making and scrapbooking.