For cutting metal 1/16 to 1/8 inch thick, pipe, conduit, and angle iron, choose the TEKTON 12 in. x 24 TPI Bi-Metal Hacksaw Blades. Hardened high-speed steel teeth are welded to a flexible steel spine, creating a blade that stays sharper longer and resists breaking under heat and stress. These blades are universal replacements for any 12-inch hacksaw frame.