Features 1. Mature manufacturing process and strict quality control: Each metal file is forged into one using mature and advanced manufacturing technology, and has a strict quality control system to ensure optimal performance. 2. Hardened alloy steel material: This needle file set is made of high hardness alloy steel and undergoes high-temperature quenching to improve hardness and durability. 3. Durable and precise file teeth: This precision steel file set has delicate surface texture, clear file tooth texture, and smooth and delicate cutting edges, improving cutting efficiency. 4. Ergonomic Soft Rubber Handle: This file features an ergonomically designed soft rubber handle that ensures comfortable grip even in damp and slippery conditions for long-term use. 5. Wide application: This medium size 4x160mm needle file kit includes 5 models (flat file, semi-circular file, triangular file, circular file, square file), which are very suitable for fine tasks on materials such as metal, wood, stone, and fine polishing, refining, shaping, and scraping projects, plastics, leather, etc. Specification Material: Alloy steel Color: Golden Size: 16 x 2 x 2 cm Weight: 100 g Package Include: 1x Small Hand Metal File Set