Features: It is made of high-quality stainless steel, durable and wear-resistant, and can be used for a long-time. Perfect for filing string slots into nuts. With the longer shaft length it makes them easier handling for filing string slots. Easy nut slotting and filing. Package includes: 1 Set 10 String Saw Rods for Nut Slotting. Specifications: Material: Stainless Steel Each Rod Length: Approx. 55mm/2.16inch Diameter: 0.4-1.6mm/0.02-0.06inch (as Shown in the Pictures) Package Includes: 1 Set 10 String Saw Rods for Nut Slotting note: 1. Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 2. These files are thin metal, especially the smaller ones which can easily bend and need work slow for smoother slots. 3. Care is recommended when using them so that they will last you a good while. 4. Use is for wood and bone, and soft metals such as brass, copper only. Not recommended for hard or ferrous metals.