2Pcs Table Workbench Fast Fixed Clip Clamp with 4pcs Bench Dogs for 20MM Hole, DIY Positioning Bench Stop and Fast Clamps for 20MM Hole Joinery Woodworking Benches Tools

These are too big. They are slightly over 20mm so as you can imagine they don't fit well in to a 20mm hole. In the case of a Festool bench the adjustable part is not so bad but the dogs are impossible. Shame. They are really well made but not much point if they don't fit.

These are great for clamping boards to my workbench for hand planing. I did have to drill some 20mm holes in the benchtop but it's worth it as these work better than using the my existing bench dogs and vices.