The Snap-On BAHCO 3906-300-18-2P 12-Inch sandflex bi-metal hand hacksaw blade 2 pack has a width of 1/2-Inch and a blade thickness of .025-Inch. There are 18 teeth per-Inch and these precision ground teeth are for all kinds of metal sawing. The blade back made of strong, flexible spring steel with a tooth line of high-alloyed super high speed steel. The bi-metal construction guarantees the blade to keep its sharpness for a long time. It combines extreme cutting performance and wear resistance with a high degree of flexibility. Vastly superior to all-hard high speed blades or conventional, flexible blades.