The Veritas Hold-Down can clamp work pieces to a bench or anywhere a 19mm (3/4in) hole can be drilled. Exceptionally high clamping forces can be obtained with this hold-down for two reasons -
With the arm free to pivot independently all levered forces are exerted downward, without any losses dues to horizontal slippage from the canting action of the hold-down post.
The fine barb-shaped grooves on the post resist upward forces, yet still allow easy entry into a hole. The long, low profile arm is unobstructed at the clamping end, allowing good access to work from all sides.
The 255mm hold-down post gives you 203mm (8in) of clamping capacity, matching the 203mm (8in) throat capacity. Used vertically in the top of a bench, or horizontally in a side skirt. Clamping forces are infinitely variable by tightening the clamping knob (machined brass) to any degree.