This is our up turning free stop lift system, which material is iron and plastic.
The surface is treated with multi-layer nickel plating, which enhances the anti-rust ability and has a long service life
The thickened arm opens and closes quietly and smoothly, with fifty thousand opening and closing times.
And the force can be adjusted by turning the inside screw.
Free stop at any position in opening angle about 60 degree or less
With soft closing function in opening angle 30 degree