Bi-Metaloy Hand Hacksaw BladeMolybdenum alloy tool steel edge. Tough flexible high carbon steel backing. Last twice as long as high-speed steel. Operates 20% to 50% faster. High tooth hardness and shock resistance. Cutting Edge Material: Bi-Metal; Cutting Length: 12 in; Quantity: 100 in bulk; Teeth Per Inch: 18; Thickness: 0.0250 in; Tooth Shape: Wavy Edge; Type: Hack Saw; Width: 1/2 in; Weight: 0.04 lb.