DIAMOND-ELECTROPLATED DURABILITY: Features special-grade diamond coating for exceptional wear resistance and consistent cutting performance. Handles delicate tasks and heavy-duty use without degradation. PRECISION CARBON STEEL CONSTRUCTION: High-quality carbon steel cores maintain shape under pressure, resist deformation, and ensure long-lasting accuracy for intricate detailing work. COMFORTABLE ANTI-SLIP GRIP: Soft PVC-dipped handles provide superior control in damp/oily conditions and minimise hand fatigue during extended jewellery-making or modelling sessions. UNIVERSAL MATERIAL COMPATIBILITY: Engineered for fine grinding on glass, tile, metal, wood, plastic, and more. Essential for jewellers, model builders, and intricate DIY projects. COMPACT 20-PIECE VALUE SET: 140mm (5.5") files with 3mm working width offer precision control. Comprehensive set ensures the right profile for any deburring, shaping, or smoothing task., Manufacturer: Lotsdonxia