My mate made me five adapters for my welding table clamp. No, I don’t have a welding table, that’s the whole point for these adapters. The clamp’s foot is 28 mm in diameter but my bench dog holes are only 20 mm wide. So now I can use the one clamp with this large foot, too. Works like a treat, I’m super happy! Since I only needed one adapter there’s room for future expansion of my inventory. :-)