Wilton® Brute Force™ C-Clamp, Heavy Duty, series: 100 Series, 2 in Throat Depth, 0 to 3 in Clamping Capacity, 8750 lb Clamping Pressure, Forged Steel Body. Wilton® Brute Force™ 100 Series C-clamps are Ideal for Heavy Construction with a Drop Forged Frame, Black Oxide Coating and Clamping Pressure Ranging up to 15,000 lb Spindles are Full Length, Machined From a Single pc of Square, Cold Drawn Steel Tempered and Hardened. Square Spindle Heads Stand up to Heavy Wrench Tightening.