The IRWIN VISE-GRIP Original Locking Chain Clamp is ideal for clamping irregularly shaped objects up to 18" in circumference. Constructed of high-grade heat-treated alloy steel for durability, it features the classic trigger release for maximum locking force and turn screw adjustment to fit work and stay adjusted for repetitive use. Backed by the IRWIN Lifetime Guarantee.Includes1X IRWIN Vise-Grip Original Chain Clamp, Locking, 9-InchFeaturesChain holds and locks around any shape or size Ideal for awkward shape pieces Turn screw to adjust pressure and fit work. Stays adjusted for repetitive use Constructed of high-grade heat-treated alloy steel for maximum toughness and durability Classic trigger release designed to provide maximum locking force Length: 11.800 in Width: 4.400 in Height: 1.000 in Capacity: 18 in circumference Weight: 1.874 lbs Material: Heat-treated alloy steel Voltage: No Voltage V Country of Origin: Taiwan