1. Applied to wooden open-in side hung window system, turn- and tilt window system and tilt and turn system.
2. Aluminum alloy cover proves the strength of the handle.
3. Can guarantee the unified surface finish, no chromatism.
4. Special color treatment is available according to profile.
5. Length of the exposed part of quadrate-tongue= 25, 30, 35, 40, 45，wide application
6. Design Patent: the locator expands while screwing, which can avoid the loose of screws and improve the compliance with transmitter
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