Just one of the many accessories available for BESSEY welding table clamps. The TWVAD is a variable angle pressure pad (VAD) that can be placed anywhere on a work table to support round stock and other odd shaped work pieces. Use these on any solid work surface. Works well in combination with TW16VAD or TW38VAD when the work piece requires support in a spot that does not line up with one of the holes in your matrix table Other available accessories are toggle clamp adapters, variable risers and an adapter that allows you to use some of the STC series toggle clamps on your matrix table. BESSEY. Simply better.