This multi-angle clamp will be your third hand. It holds stock at the ideal angle and height while you weld, cut, sand, or paint. It can be held at any positions because of its ball joint adjustment and locking system. It features a universal clamp base for mounting on flat or square surfaces (up to 2 inch thick), angle iron, or 1in round posts. This .75 inch slotted adaptor head accepts pliers, clamps or holds round, flat, square or angled stock. Manufacturer Part Number: HAS42