Hardened and tempered carbon steel with milled and set teeth, Metal cutting 32tpi, wood cutting 15tpi, Spare blade for junior hacksaw frames, Made of hardened and tempered carbon steel, teeth milled and set, For cutting of metal: 12 teeth/cm, 32 teeth/inch, For cutting of wood: 6 teeth/cm, 15 teeth/inch, 5P: 5 blades in a special package with hanging loop, Blades to suit 228 junior hacksaw and 268 mini hacksaw blades,