The PROFI-BOX DUOPOWER/DUOTEC dowel and screw set from Fischer is used for various masonry tasks in homes, garages, and workshops. This clever 2-component dowel set with screws is suitable for fastening all types of building materials, even aerated concrete and bridge plaster. It automatically adapts to the building material and transfers high loads through its three functions: folding, expanding, and knotting. The narrow dowel rim prevents the dowel from slipping in the drill hole. This Fischer set is perfect for the most common applications and building materials, complete with the right screws for a secure hold. Thanks to the included plastic box with a transparent lid and multiple compartments, the components can be easily stored and selected.