aluminium small hinge joint folding step ladder locking hinge

Folding ladder hinge, big ladder hinge, small hinge ladder Steel material
1) high qualit with low price
2) use as hinge for multipurpose ladder
3) auto locking 
4) Main material: steel 
5) Max. working load: 150kg
6) Weight: 0.85kg
7) Thickness: 2.0mm 
aluminum ladder parts ladder hinges
silver oxidization surface treatment. .
used in ladders.
can be choiced by your request

best quality jinhua aluminium folding ladder locking hinge parts