Armor-Tool PBB-12 Dog Bracket Armor Auto-Pro Dog Brackets are a perfect way to add clamping capability to your workbench Auto-Pro PBB-12 contains six 3/4" Dog holes that accommodate Armor Auto Adjust in line and Hold Down Dog Clamps Mount to any workbench, or mount to existing Dog tables to extend clamping range. Mount to table top or on the side. Requires seven #8 Wood screws