Description:1. This Hobby Knife Set contains three handles (heavy duty, medium and standard use) and includes 13 interchangeable blades. 2. This set is perfect for cutting a wide variety of materials including cardboard, fabric, leather and plastic. 3. Knife Blades are constructed from SK5 steel to ensure excellent blade sharpness and extended durability. 4. The Hobby Knives also come in a case with a magnetic strip to keep extra blades safely stored.Content:13 pcs of Knife Set.