Designed to grip materials firmly, the Irwin VISE-GRIP 6SP Locking C-Clamp is a great addition to your tool kit. The clamping force can be adjusted by tightening or loosening the screw mechanism. The locking mechanism is a trigger release and micro-adjustment for a tight hold on your work piece. It has an overall length of 6 in., a throat depth of 1 1/2 in., and a max opening of 2 1/8 in. This product comes with nickel plating that resists corrosion. Whether you are looking for increased performance or just want to have more control over your tools, this Irwin VISE-GRIP Locking C-Clamp will meet all your needs.