Klein Tools 86522 Hand Seamer, Straight Metal Seamer has 3-Inch Jaw,

Compound-leverage mechanism easily and accurately bends, seams, and flattens sheet metal 3-Inch jaw folds 22 gauge steel and 24 gauge stainless steel Jaw marked in 1/4-Inch increments for precise bending measurements All-steel construction and nickel-chrome plated hardware for long life and durability Convenient self-opening latch for one handed operation