DSPIAE – Double-Sided Metal Hand File for Precision Filing, Deburring, Polishing, Modeling & DIY –Dual Grit Stainless Steel File 400/800 Model AT-FX01 Dimensions 165×10×2mm Net weight 25±1g Construction Stainless Steel Precautions ① Children under 14 years old are prohibited from using this product. ② Store this product with protective sheath after use is recommended. ③ Do not use this product on hard metal/objects as this will shorten product's service life. ④ Do not bend this product with brutal force, avoid dropping this product to hard surface from high above. ⑤ Do not use wire brushes or similar hard tools for cleaning this product as they will shorten product's service life. ⑥ Never attempt using this product on hard objects and metals such as iron or aluminium alloy as this may damage file teeth. ⑥ Avoid using this product on soft metals like tin or gold, as they may cause excessive wear of the DLC coating, therefore weaken the anti-rust performance.