Lightweight plastic clamps with 1 fixed jaw and 1 adjustable jaw. To use, slide adjustable jaw up to workpiece and press tapered locking wedge to hold. For clamping delicate work where proper tension is a must. Clamps incorporate side beams marked in inches. Notched jaws to help keep projects steady and easy to use quick release lock. (3 1/4" opening, 1" depth). 2 per pack.