The ESSVE Level screw is designed for use as an adjustable support for window frames. Adjustment is between 7-35 mm height. Each bolt can be loaded with a maximum of 110 kg.

The screw is produced in hardened carbon steel with bright zinc plated surface treatment for indoor environments. It is equipped with 1 fibre cut at the point, a long threaded section that provides good bearing strength, while the large head prevents the screw from being pressed into the underside of the frame. The screw head consists of a round, concave washer on top with a TX30 bit drive for installation, and a 20 mm hex washer for adjustment. Adjuster tool (item no. 105254) is used for adjustment.

Normally, two level screws are used (double windows with a mullion must also have a screw under the mullion). The screws need to be placed as close to the outer edges of the frame as possible. The screws are screwed down to the required depth. The level screws are then levelled using a spirit level and adjusted horizontally with the adjuster tool (item no.105254). The air gap under the frame should be about 15 mm. The screw is screwed into wood without pre-drilling. In concrete drill with 6 mm holes. In brick drill with 5 mm holes. The lightweight drill with 10mm holes and then complemented the level screw with plug. (Item no. 50020).