For cutting metal 1/8 to 3/16 inch thick, rebar, and heavy pipe, choose the TEKTON 12 in. x 18 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.