H350 Hacksaw Blades Flexible Carded Sutton Tools Flexible HSS Hacksaw Blades are suitable for general purpose use with added flexibility & safety. 18 TPI: For 6-25mm materials eg pipe, angle iron & steel bar. 24 TPI: For 3-6mm materials eg conduit, heavy sheet metal & tubing. 32 TPI: For <3mm materials eg thin sheet metal & metal trim. All Sutton Tools hacksaw blades have 300mm hole centres to fit all standard size hacksaw frames. Colour coded and clear markings for easy identification 300mm pin hole centres fit all standard hacksaw frames Flexible HSS - General purpose blade with flexibility & safety