Bahco 24tpi 300mm 12in Hacksaw Blades Sandflex Pack of 100 BAH390624 Virtually unbreakable and shatterproof bi-metal blade Precision ground teeth for all kinds of metal sawing. Strong, flexible spring steel blade with the tooth line in high-alloyed, super high speed steel. Guaranteed to keep its sharpness for a long time. The SANDFLEX blade combines extreme cutting performance and wear resistance with a high degree of flexibility and is vastly superior to all-hard high speed blades or conventional, flexible blades.