The fischer spacing screw ASL is a special screw made of zinc-plated steel with two coordinated threads at the same pitch, allowing for precise and time-saving stand-off installation. The special screw is used in through-type installation. When driving in the screw, the external thread cuts into the pre-drilled fixture, and fixes it. If the screw is driven in at an angle of 15 - 30° then higher shear loads can be carried. The fischer spacing screw ASL is ideal for fixing timber window and door frames, cladding, and sub-constructions without plugs in wood and wood materials.