The Irwin 10504243 is a 100 pack of Trapezoid Knife Blades. Bi-Metal is formed by welding highspeed steel edge and spring steel, having the benefit of both types increases safety and a longer life. Irwin Bi-metal Blades are safer since they will not break under normal working conditions, and they help reduce the risk of injury from breaking or shattering blades. And, with the blades lasting longer than traditional carbon blades, they result in fewer blade changes which means fewer accidental cuts.
PrimeTools is an authorised Irwin stockist, we only sell 100% genuine tools