Features Specifications:Sell Best flexible bi-metal hack saws blade BF999  Best flexible bi-metal hack saws blade  Imported material from Austria, the same steel plant who supply Sandvik. M42 High Speed Steel on the teeth and D6A Spring Steel on the back. Heat treated in the vacuum furnace. Top quality of the world. (cutting tools or hand tools) When we bend the blades it can spring back well and recover its original shape. Size:10x1/2x14T/18T/24T/32T  12x1/2x14T/18T/24T/32T