The Bahco 3906 Sandflex® Bi-Metal Hacksaw Blades are virtually unbreakable and shatterproof bi-metal blade with precision ground teeth for all kinds of metal sawing. With a blade back of strong, flexible spring steel and a tooth line in high-alloyed, super high speed steel, this blade is guaranteed to keep its sharpness for a long time.These Bahco 3906 Sandflex Hacksaw Blades 300mm (12in) x 18tpi are supplied as a pack of ;10, in a special package with a hanging loop.