- Pre-drill holes at the correct positions on doors and windows and align the screws in the holes to secure the front face of the doors and windows. - Compatible with casement windows, interior sash windows, hanging windows, skylights, and similar installations in homes, offices, schools, and other buildings. - Lightweight yet robust, offering durable, impact resistant, heat resistant, and corrosion resistant performance that is not prone to rust. - User friendly design with lockable window handles for easy, secure closing and reopening. - Use scenarios - New installation or replacement in residential homes with casement or sash windows and skylights. - Office buildings and schools where windows are frequently opened and closed and durability is important. - Renovations of commercial spaces requiring reliable window hardware for secure operation.