(1) Hand-cranked window openers are suitable for opening and closing side windows with a middle or top-hung sash in buildings like general industrial factories, warehouses, auditoriums, canteens, etc.; they can be fixed and matched with windows made of aluminum alloy, PVC, stainless steel, and steel materials.

(2) The main unit is made of aluminum magnesium die-casting, offering aesthetic appearance, corrosion resistance, and anti-rust properties.

(3) Aluminum magnesium die-cast supports with cold-drawn steel rods, zinc-plated or Dacromet-coated.

(4) Safe and reliable with minimal failures, easy to install and maintain.