Wilton Spark-Duty 400P/400CS Hi-Vis C-Clamps Manufactured with drop-forged steel for greater strength in standard applications. V-grooved anvil feature allows secure holding of all materials including rounds, squares, and flats. Acme-rolled spindle threads provide continuous smooth operation for faster clamping action and maximum strength. Spindles and Perma Pads are copper-plated to provide resistance to welding spatter and corrosion. Ideal for industrial welders and steel fabrication Pack of 1