SHVHD30M | Stronghand Hold Down Clamp Hold down action clamps with unique features and accessories. Bolt the clamp down to your worktable using the 3/8? hole in the base. Capacity: 70mm The 1/2? copper plated Acme spindle resists weld spatter and the swivel tip makes quick contact with your workpiece. Hold pipes by adding our Clip-On V-Pad Part #SHXDA2.