Key points for selection:
  1. Select the correct handle that can match the profile, provided by us or suggested by other reference materials.
  2. From the aspect of product design and machanics, specially when it is long transmission distance, square handle+transmission box is better than fork handle+transmission rod. Thus when we choose handle for outward open window, we shall pay attention to the following 2 points:
A. We should choose square handle+transmission box when the outward open window is with general insulation profile.
B.  The length of the fork should not be more than 50mm.

 Key points for installation:
  1.Decide the correct position and size of A and B according to the selected aluminium door handles and other items.
  2. After the position is decided, drill for screw and square shaft on profile according to the handle.
  3. The handle must operate freely on the profile.
  4. The installation position must be aligned with its matching transmission device, non-interference or deflective.
Note: Different handle matches different transmission devices and profiles, there is a difference on the position and the size of the punching hole. Please contact when it is necessary.