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✅ Complete 7-Piece Multi-Shape File Combination The full set includes 1 ergonomic anti-slip handle + 6 different profile file tips: round, square, triangle, flat, half-round, thin flat, covering all fine polishing needs. Matching storage rack for neat storage and easy tip switching. ✅ High Hardness Gcr15 Steel File Blades All file heads adopt high-hardness Gcr15 steel, sharp uniform tooth texture, efficient material removal, wear-resistant and long service life. Can withstand high-temperature grinding without bending, suitable for heavy-duty continuous trimming work. Compare cheap files: Ordinary low-carbon steel files rust easily, teeth wear down quickly, plastic handles crack after short use; this set’s metal file tips stay sharp and durable. ✅ Quick-Change Aluminum Alloy Chuck Handle Thick knurled aluminum locking chuck, twist to fasten/release file tips, quick interchange without extra tools Ergonomic dual-material TPR rubber grip, anti-slip texture, comfortable long-time holding, reduce hand fatigue during precise polishing Integral thickened handle structure, no breakage under heavy pressure ✅ Wide Multi-Scenario Application Metal processing: Metal burr removal, edge chamfering, rust cleaning Woodworking: Wood carving trimming, surface fine sanding Plastic model: 3D printed model flash trimming, plastic part shaping Handicraft & jewelry: Jade, silver, copper jewelry fine polishing, detail modification ✅ Heavy-Duty Explosion & Freeze Resistant Structure Passed high-pressure grinding impact test and low-temperature anti-crack test, stable structure without deformation or fracture under harsh workshop environment. ✅ Humanized Portable Design Comes with integrated storage rack + retail blister packaging, easy to store all file tips without loss, convenient for home DIY, studio craft work, outdoor maintenance carry. ✅ Core Advantages Over Ordinary Cheap File Kits Gcr15 high-hardness steel vs low-carbon soft steel, sharper, wear-resistant, no quick tooth dulling Met