Entrance Door Hinge

Optimized for residential project and designed for minimum maintenance.
Save you the labor and cost of installing concealed door closer or floor spring.
Suitable for Fire-rated door.
Cost efficiency, zero maintenance, fire safety all covered.

heavy duty door closer-K51L-3D
Heavy entrance door hinge


Specialized hinge structure for heavyweight doors.
3D adjusters come in various sizes to fit frames of all kinds.
You can effortlessly adjust both the position of door and hinge via adjuster in all dimensions.

Case Study
Heavy entrance door hinge-self closing door
Waterson hinge helper
K51L-3D Waterson Lever – Installation support for installation of heavy door

Waterson hinge helper

Special lever design keeps heavy door straight up safely and save the energy-draining process of door-lifting during installation.
Highly durable and simply dependable.

Sold separately

Contact for details
Waterson hinge helper - installation support

Videos for fire resistance test


UL and SGS test report


More information? welcome to contact us!


More information? welcome to contact us!


More information? welcome to contact us!

Installation Instruction

Installation guide

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