Security door handle, double living single, live double fast machine, how to distinguish?
You should be referring to the mechanical lock, the lock body is divided into standard mechanical lock (equipped with single live or double live handle) and double fast mechanical lock (equipped with double fast handle).
Double fast (outside of the handle can be raised quickly to lock the door, inside the handle can be provided to achieve rapid locking can also achieve rapid downward pressure to open the door, but the handle must double fast and double fast lock together to achieve fast locked fast open function)
I am Ka Ka anti-theft door Zhengzhou dealers, handle only pointsSingle live (outside handle is fixed, inside handle only downward pressure)Double live (both inside and outside the handle can press downward)
