6 pack 4 inch C Clamps with 1125 lbs clamping force Power coated reinforced malleable steel jaws provide powerful and rigid clamping Zinc plated carbon steel Acme screw turns smoothly and produces maximal clamping pressure with less effort. The screw end has a swivel pad to allow gripping of various shaped parts. Zinc plated sliding pin bar handle Specifications: Maximum jaw opening: 4-1/4 inches; Throat or jaw depth: 2 inches; Swivel pad diameter: 7/8 inch; Jaw pad width: 15/16 inch; Thread diameter: 1/2 inch; Thread Length: 4-1/2 inches; Maximum clamping force: 1125 lbs These medium duty C-clamps are the ideal clamping solution for the professional, serious hobbyist or DIYer and are the perfect solution for numerous everyday clamping operations. They feature a reinforced malleable steel body that provides powerful and rigid clamping. The body is powder coated to resist corrosion. The moveable spindles feature smooth-turning carbon steel Acme screws that produce high clamping pressure with the least effort. The spindle end has a swivel pad to allow gripping of various shaped parts. Handle has a sliding pin bar to allow use in confined areas. Both the sliding bar pin and Acme screws are zinc plated to prevent corrosion. Spindle fully closes tight to the opposite jaw face.