4 Inch Door Hinges Heavy Duty, XinSheng 316 Stainless Steel Marine Grade Ball Bearing, Rust Proof for Interior Exterior Doors, 3 Pack

MARINE-GRADE 316 STAINLESS STEEL - Superior rust resistance vs standard 304 steel, rigorously tested for 148-hour salt spray resistance, ideal for coastal and high-salt environments. | 220LBS LOAD CAPACITY - Each 4"x4" hinge is 3mm thick, set of 3 supports up to 220 lbs for gates, exterior doors, and security applications with smooth operation. | NON-REMOVABLE PIN SECURITY - Enhanced safety with non-removable hinge pins, perfect for exterior outswing doors and security applications requiring tamper resistance. | BALL BEARING DESIGN - Precision ball bearings ensure smooth, quiet operation with reduced friction and extended lifespan (50,000+ cycles zero-wear tested). | VERSATILE INSTALLATION - Perfect for interior doors, exterior doors, gates, cabinets, and marine applications. Includes all mounting hardware for easy installation. | WEATHERPROOF CONSTRUCTION - Engineered to withstand extreme weather, saltwater exposure, and temperature fluctuations without compromising performance or appearance.