4 Inch Two Ball Bearing Single Security Stud Hinge Butt Door Hinge

4 Inch Two Ball Bearing Single Security Stud Hinge Butt Door Hinge. UL Listed Fire Rating: Standard UL Listed with up to 3 hours fire-rated certification for high safety assurance. Premium Stainless Steel: Available in SUS201, SUS304, and SUS316 grades to meet diverse corrosion resistance needs. Versatile Finish Options: Includes Satin, Polished, Chrome-plated, PVD, AB, AC, and MB finishes for various aesthetics. Ball Bearing Design: Features two ball bearings for smooth, quiet, and durable door operation. 5-Year Mechanical Guarantee: Comprehensive 5-year mechanical guarantee ensuring long-term product reliability. OEM and ODM Services: Professional OEM and ODM capabilities with experience cooperating with famous brands. SGS Audit Factory: Manufactured in an SGS Audit factory with over 10 years of architectural hardware experience. Free Sample Evaluation: Offer 3 pcs free samples for evaluation upon request with buyer-provided courier account.