【PREMIUM PERFORMANCE】- The durable teeth of the gold-plated steel files are deeply hardened and coated to provide long-lasting cutting and boring performance. 【PORTABLE UPGRADED DESIGN】- After receiving customer feedback that the storage bag was easily damaged, we immediately improved the packaging design to prevent this issue from recurring. All the metal files are housed in a sturdy, compact, and portable carrying case. Each metal file is securely held in place to prevent movement and scratches, making it easy to store and transport. 【NON-SLIP GRIP DESIGN】- The rubberized handle is very easy to grip and fits comfortably in your hand. Its ergonomic design prevents it from falling during use. 【WIDE RANGE OF APPLICATIONS】- Ideal for sanding metal, surface treatment of wood, metal, mirrors, glass, tiles, ceramics, leather, etc., a good choice for woodworkers and DIY enthusiasts.