The Klein Tools 3 in. Straight Hand Seamer is a premium tool designed for HVAC professionals that boasts a compound-leverage mechanism, self-opening latch, and 3 in. steel jaw. This jaw is marked in 1/4 in. increments for precise bending measurements, and can easily fold 22-Gauge steel and 24-Gauge stainless steel. The tool is made with all-steel construction and nickel-chrome plated hardware for maximum durability, and features comfortable, contoured grips for a comfortable and secure hold while working.