Practical Guitar Bass Nut Bridge File Set Luthier Tool Box with 13 Round Files 1 Flat File Features: 13 different sizes of round files for polishing the string slots, and it makes the string slot very smooth. 1 flat file for burnishing the nut and bridge. Adopting premium aluminum alloy material, anti-rust and sturdy. Storage box and files are integrated together, compact size, easy and convenient e and carry. Very ideal DIY tool for string instruments, such as guitar, bass, etc. Specification: Condition: Matrial: Stainless Steel Color: Dark Blue+Silver(Shown as pictures) File Quantity: 13 Round Files & 1 Flat File Box Dimensions: Approx. 7.5x2.8x1.3cm/2.95x1.10x0.51" Round Files Diameter: Approx. 0.4mm/0.015", 0.5mm/0.019", 0.6mm/0.023", 0.7mm/0.027", 0.8mm/0.031", 0.9mm/0.035", 1mm/0.039", 1.1mm/0.043", 1.2mm/0.047", 1.3mm/0.051", 1.4mm/0.055", 1.5mm/0.059", 1.6mm/0.062" Weight: Approx. 24g Packing List: 1 x Guitar Nut Bridge File Set