Good Material: Made of high quality stainless steel, sturdy, high strength, rustproof and durable. The saddle file and card grinder are all made of stainless steel, smooth and easy to use, and very durable so that you can use them for a long time. Easy to carry: all needle guitars for Saddle files are stored in a small box. It is very small and light, easy to carry, can be used after opening the box, and is not easily lost. Ideal tool: The guitar slotting tool is small, so it is very convenient to carry. So if you plan to travel with your guitar, you can transport it if it gets damaged. Quick to use: You will be happy to work the grooves of your guitar and your nut whatever its composite material: bone, ivory, plastic, wood… The guitar file and rods are made of stainless steel, which makes the tool smooth and very easy to use. Wide Use: This wheel makes it easy and safe to scrub spindle, nut and bridge flange. Perfect for storing string slots in guitar nuts and bridges Ideal for