Good Material: Made of high quality stainless steel, sturdy, high strength, anti-rust 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 saddle file needles guitars 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 easy to lose. Ideal tool: The guitar slotting tool is small, so it is very convenient to carry. Therefore, if you plan to travel with your guitar, you can transport it if it is damaged. Quick to use: You will be happy to work on your guitar and saddle grooves regardless of its composite material: bone, ivory, plastic, wood..... The file and guitar rods are made of stainless steel, which is each Makes the tool smooth and very easy to use. Wide Use: This grinding wheel provides an easy and safe to rub the spindle, the nut and the collar of the bridge. Perfect for storing string slots in guitar nuts and bridges Ideal for acoustic guitar, ukulele, bass, electric guitar, banjo, mandolin, etc. Features: - Made of high quality stainless steel, sturdy, high strength, rustproof and durable. - This tool set is small in volume, so it is very easy and convenient to carry, not easy to get lost. - Extended handle is great for firm grip and convenient use. - The easel file and card grinder are all made of stainless steel, smooth and easy to use. - Universal for string instruments, guitar, mandolin, bass, ukulele and banjo etc. Specification: Material: stainless steel Size: 7.5 * 2.8 * 1.3 cm / 2.9 * 1.1 * 0.5 inch Color: dark blue + silver (as pictures show) Scope of delivery: 1* guitar care set