1. Applied to wooden open-in side hung window system, turn- and tilt window system and tilt and turn system.
2. Same for left and right, convenient for storage.
3. Axle parallels to the snap spring to avoid it popup. Chamfer design of the axle can be easy installation and teardown.
4. The heart-shape hinge basement and tilted screws design can increase strength of product.
5. Can guarantee the unified surface finish, no chromatism.
6. Special color treatment is available according to profile.
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