SGC-300 Tweco Steel Ground ClampGround clamp made with durable steel upper and lower levers. Additional bronze material in the lower jaw and brass alloy in the upper jaw work to further strengthen clamp. A heavy duty spring provides clamping force to the work surface. A rugged and reliable design provides long-lasting clamp performance. Amps: 300.00 A; Cable Capacity 2: 1/2 in Stud Connection; Jaw Material: Copper; Jaw Opening: 2 in; Length: 9 in; Throat Depth: 1 3/4 in; Type: Clamp; Weight: 0.81 lb.