Spark Duty™ 400P 400CS Hi Vis C Clamp, Sliding Pin, 4 1 8 in Throat Depth, Gray, 0 in to 6 1 16 in Opening ORS NASCO soft temple material Rimless design for soft temple material Rimless design for unobstructed vision Universal nose bridge Welding styles available flexible cure Resists gasoline 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 Manufactured with drop forged steel for greater strength in standard applications V grooved anvil feature allows secure holding of all materials including rounds