The glazier can easily lift a large window with a glazing lever. It has a stem (approx. 20 cm) with a rectangular, thick (approx. 2-3 cm) blade with one straight and one sloping side attached to it. The tool is slid under the glass with the sloping side down; once under the glass, the stem is pushed down and the glass comes up.
The glazing lever can be monoxile or plastic with a wooden handle. [MOT]