The Proline 17381 cutters are a specialized type of hand tool designed for cutting through iron, copper, and aluminium sheet metal. They have a unique design that features a forged steel jaw with teeth, a curved handle, and a bevelled cutting edge. The combination of these features make these cutters ideal for use in a variety of metalworking applications. These cutters are made from heat-treated steel for increased strength and durability, and the jaws are designed to prevent slipping or damage to the metal. The bevelled cutting edge is designed to provide a smooth, clean cut. These cutters can be used for cutting, crimping, clamping, and ranking sheet metal and other materials.