Concrete and solid masonry units, vertically perforated bricks, aerated concrete, lightweight concrete hollow blocks. The dowel must be placed flush in the load-bearing substrate.
Screws that can be used:
Wood or chipboard screws
Advantages:
•special fixing wings to keep the screw fixed in place, making overhead applications easier, •the short dowel length enables quick installation thanks to the shallow drill hole depth, •in a long version with high load-bearing capacity in perforated building materials, aerated concrete or when bridging plaster, •the pronounced dowel edge prevents the dowel from slipping deeper into the drill hole