Features Spanish Forged steel jaw provides outstanding strength. Full floating hook jaw, provides instant grip, easy release. Large knurl and power threads provide fast, positive jaw adjustment. Handle Material / Cast Iron Jaw Capacity / 3 1/2 in Jaw Texture / Serrated Overall Length / 18 in Handle Type / I-Beam Tether Style / Tether Capable Corrosion Resistant / Yes Adjustable / Manual Adjustment Type / Screw Mechanism Jaw Material / Steel Standards Federal Specification / GGG-W-00651D