TORQUE LOCK™: Faster set up and easy release when clamping flat material. Extra force can be applied to the TORQUE LOCK™ screw for better and more secure grip. Can also be used for hanging / storage purposes. Hardened jaws: better grip force on jobsite material. Rust protection: chrome plated tool increases life by reducing corrosion. Lever release design: traditional release lever for jobsite convenience. The seamer makes all kinds of bendings, forming, crimping tasks with ease. It is ideal for holding sheet metal parts.