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D&D Hardware Safety Door Lock CE Fireproof Mortise Bathroom Door Lock. Fireproof Certification: CE certified with 240-minute fire rating (EN1643) for enhanced safety. High Durability: Tested for 200,000 cycles with 240-hour corrosion resistance. Customizable Finish: Available in SSS, PVD, AB, AC finishes and multiple colors. Premium Material: Constructed with Stainless Steel 304 for latch and dead bolts. Flexible Backset: Supports 55mm, 60mm, and 65mm backsets for various doors. OEM/ODM Service: Professional OEM and ODM services for famous brands. 5-Year Guarantee: Comprehensive 5-year mechanical guarantee on products. Wide Application: Suitable for wooden, metal, fire, and outer doors.