Fixture table clamp and stop holder
This will hold your pliers or clamps with the large opening at the bottom, as well as any stops you've got on top. Made for fixtures using 5/8" holes but should work for 16mm as well. Slots are made wide for ease of installation on a variety of tables. Use a press brake to bend on the dotted line (between the slots and hole openings) or implement your own cut lines for ease of bending in a vise.