Features: Square steel structure provides high strength clamping force for safety use Replaceable serrated main jaws provide tight grip Large anvil work surface for shaping Square steel structure provides high strength clamping force for safety use Replaceable serrated main jaws provide tight grip Large anvil work surface for shaping Machined base plate for smooth swivel with lug holes for secure positioning Manufactured from heavy duty cast iron for strength and durability Excellent clamping force. .