Welding Ground Clamp, Maximum Current 400 A, Compatible Cable Gauge (Maximum) 3 AWG, Maximum Jaw Opening 4 1/2 in, Throat Depth 2 5/8 in, Clamp Body Material Copper Plated Steel, Clamp Type Ground Clamp, Compatible with Surface Type Flat, Round, Features Deep Reach Jaw, Overall Length 7.5 in, Overall Width 7 in