This set includes 10pcs 9" Reciprocating Saw Blades designed for cutting wood and metal with fine-toothed teeth and a teeth per inch of 2. These blades are made of high carbon steel and have a full length of 225mm and a tooth width of 4mm for precise and efficient cutting. They are suitable for various industries such as automobile manufacturing, shipbuilding, aviation, furniture, and more. With a high hardness and durability, these blades are a practical and multifunctional tool for any project. Please note that there may be slight measurement errors and color differences due to manual measurement and screen settings.