Shark Blades replacement Bi-Metal Hand Hacksaw Blades with precision teeth for all kinds of metal and wood. The amount of teeth per inch (TPI) is a very important factor when choosing a handsaw blade as these affect the cutting ability. 

18 TPI - for sawing 6mm - 25mm materials, e.g. pipe, angle iron and steel bar.

24 TPI - for sawing 3mm - 6mm materials, e.g. conduit, heavy sheet metal and tubing.

32 TPI - for sawing 3mm materials, e.g. thin sheet metal and metal trim.