Spiral teeth design is very sharp and efficient, which makes the cutting very smooth and fast. And it is multifunction, can be used to cutting many kinds of things, very practical. Adopting fine workmanship, these wire saw blades are very durable and wear-resistant, very helpful compatible your cutting work. Made of high quality alloy steel material, it is very durable to use. Length of the saws is about 130mm. The jig saws are used compatible cutting all kinds of soft and hard wood, planks, carbon steel, copper, aluminum and other metals, and also compatible sawing plastic, acrylic sheets, etc. Item Name: Jig Saws Material: Alloy Steel Product Specification: 1, 2, 3, 4, 5, 6, 7, 8 Features: Sharp, Spiral Teeth, High Efficiency Size Details: Length: 13cm/5.12" (Approx.) Size: 1, Diameter: 0.07cm/0.03", Tooth Pitch: 0.021cm/0.01" (Approx.) Size: 2, Diameter: 0.085cm/0.03", Tooth Pitch: 0.0235cm/0.01" (Approx.) Size: 3, Diameter: 0.09cm/0.04", Tooth Pitch: 0.0255cm/0.01" (Approx.) Size: 4, Diameter: 0.095cm/0.04", Tooth Pitch: 0.027cm/0.01" (Approx.) Size: 5, Diameter: 0.105cm/0.04", Tooth Pitch: 0.029cm/0.01" (Approx.) Size: 6, Diameter: 0.113cm/0.04", Tooth Pitch: 0.0315cm/0.01" (Approx.) Size: 7, Diameter: 0.128cm/0.05", Tooth Pitch: 0.0345cm/0.01" (Approx.) Size: 8, Diameter: 0.135cm/0.05", Tooth Pitch: 0.037cm/0.01" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 12 x Jig Saws