Features: The thicker item you want to cut, the thinner saw blade should be. It is suggested that use 1, 2, 3 saw blade to saw the metal; 4 5 6 7 is suitable for wood sawing; 8 can be applied on sawing plastic. Sharp tooth resists loading and improves cutting speeds. Forged from high carbon steel, through fine process, with high hardness and strength. This package is a total of 12pcs saw blade, convenient to replace the broken or worn one. Curve sawing is very relaxed, the blade is not stuck. Specification: Material: Carbon Steel Options: 1, 2, 3, 4, 5, 6, 7, 8 (The diameters are sorted from small to large) Quantity: 12pcs/set Size: Approx. 13 * 0.1 * 0.1cm / 5.12 * 0.04 * 0.04inch Weight: 4 - 11g Type: Saw Blades Package List: 1 * Set of 12 Saw Blades Package List 1The thicker item you want to cut, the thinner saw blade should be. It is suggested that use 1, 2, 3 saw blade to saw the metal; 4 5 6 7 is suitable for wood sawing; 8 can be applied on sawing plastic 2Sharp tooth resists loading and improves cutting speeds 3Forged from high carbon steel, through fine process, with high hardness and strength 4This package is a total of 12pcs saw blade, convenient to replace the broken or worn one 5Curve sawing is very relaxed, the blade is not stuck