Deep Reach Locking Clamp 11 in Capacity 4-1/2 in Throat Depth 3 in Jaw Type J-shaped Clamping Force 310 lb Locking Mechanism Plastic Coated Release Lever Screw Mechanism Adjust Clamping Pressure And Jaw Angle Using Screws With Lock Nuts Pliers Length 11 in Hardened Chrome Vanadium Steel Hardened Chrome Vanadium Steel Clamps Over Angles Channel Iron or Obstructions