Bahco BAH3906185P 3906 Sandflex Hacksaw Blades 300mm (12in) x 18 TPI (Pack 5) The Bahco 3906 Sandflex® Bi-Metal Hacksaw Blades are virtually unbreakable and shatterproof 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. 1 x Pack of 5 Bahco 3906 Sandflex® Hacksaw Blades 300mm (12in) x 18 TPI.