The jaws of the Malco hand seamers are drop-forged, high-impact steel. Hardened steel handles resists abuse. Powerful compound leverage design. Tool also features rust resistant nickel plating. Designed for all the metal trades, including HVACR installation, roofing and siding applications, and commercial building and remodeling. The handle opening of Malco's Redline gripped tools maximizes the powerful leverage of compound head-to-handle linkage while providing a more comfortable operating range for your hand. Ergonomic handle contours with an over-molded, non-slip handle insert ensures a natural fit and feel for the way you work. Easy one-hand-operation, including an easy open and close latch motion, always leaves a free hand to steady work piece.