4.5 Inch Heavy Duty Square Corner Commercial Ball Bearing Door Hinges, Stainless Steel, Commercial Grade, Mortise Mount, 200+ LB Capacity, High-Traffic Interior & Exterior Doors (6)

TRUE COMMERCIAL GRADE STRENGTH – 4.5 inch heavy duty square corner ball bearing door hinges rated for 200+ lb solid wood and steel doors,Max rotation angle up to 315°.including 48 pcs self-tapping screws and 48 pcs flat head screws.

SMOOTH BALL BEARING OPERATION – Built for 50,000+ open/close cycles in high-traffic commercial environments.makes it quieter and smoother when you open and close the door. ball bearing door hinges are design non-removable pins for enhanced security and stability.

SQUARE CORNER DESIGN – Requires square corner mortise preparation, not compatible with rounded 5/8 radius doors.Brushed nickel finish which is scratch-resistant and rust-proof. Hinges meets ANSI/BHMA standards, Suitable for all types of doors. Super Bearing Capacity

INTERIOR & EXTERIOR USE – Stainless steel construction resists rust and daily wear in demanding commercial environments.perfect for any commercial or intensively used door like office doors, warehouse doors, kitchen and bathroom doors, yard gates, garage doors, etc.heavy duty door hinges also can be mounted on door frames, shed windows,cabinets, wooden boxes, shutters, skylights, vents, etc.

Installation：All you need is a screwdriver or drill and you can install or replace it in minutes.（Note: Each hinge must be filled with 8 screws, please check the position of the 8 holes carefully before installation.)We recommend at least 3 hinges per door.

Designed for true commercial performance these 4.5 inch heavy duty square corner ball bearing door hinges are built to handle constant use in high traffic environments Rated for doors weighing over 200 pounds they provide reliable support for solid wood metal and steel doors commonly found in commercial buildings The precision ball bearing system ensures smooth quiet operation while significantly extending hinge lifespan compared to standard residential hinges Square corner mortise mount design ensures fast installation and compatibility with most commercial door preparations Ideal for offices retail storefronts schools hospitals warehouses and other professional applications