Bessey WSM-12 9-1/2-Inch Welders Angle Clamp Unobstructed working area allows free access for welding or assembly operations and through-ways for T joints Two-way swivel mounted spindle automatically adjusts the clamping block to workpieces of different thicknesses Holds workpieces at a 90 degree angle Ideal for plates, angle iron, square tubing, pipe, channel iron, etc. Made of spheroidal cast iron for use as a heavy duty welder's vise