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✅ Full SUS304 Stainless Steel Integral Construction Whole lock body + shackle forged from 304 stainless steel, permanent rust-free Pass strict salt spray corrosion test, works stably in coastal, rainy, high humidity outdoor environments No oxidation, rust or seized key issues that plague ordinary iron locks ✅ Semi-Enclosed Anti-Shear U-Shackle Design Partial shroud covers both sides of the shackle, greatly reducing exposed cutting area 10mm thick hardened stainless steel shackle, withstand 20-ton hydraulic shear force, anti-saw, anti-plier cutting High-temperature quenching hardening process, shackle will not bend or break under violent impact ✅ Exact Dimension Specifications Lock body width: 50mm Lock body depth: 20mm Total lock height: 78mm Shackle diameter: 10mm Inner opening clearance: 23mm (width) × 65mm (height) Comes with 4 matching precision keys for backup management ✅ Built-In Smart Bottom Drainage System Reserved small drain holes at the lock bottom, automatically drain rainwater entering the lock cavity Prevent water stagnation inside the lock, avoid lock core rust and key jamming, long-term outdoor use without failure ✅ Triple Core Security Protection Anti-Saw: Hardened stainless steel shackle resists hacksaw cutting Anti-Cutting: Semi-shroud structure blocks hydraulic shear and bolt cutters Anti-Corrosion: 304 stainless steel body repels rain, salt fog and moisture ✅ Multi-Scenario Indoor & Outdoor Universal Use Coastal docks & seaside storage: Salt fog resistant rust-free performance Logistics cargo containers & delivery truck rear doors Factory warehouse rolling shutters, commercial shop security gates Home courtyard iron gates, chain fences, garden storage lockers Construction site temporary storage, rental property shared access locks ✅ Core Advantages vs Ordinary Iron Padlocks Full 304 stainless steel, zero rust, suitable for year-round outdoor exposure Semi-enclosed shroud greatly improves anti-theft performance over fully open shackle locks Drai