Self cutting masonry screws have become a popular fastener choice for door and window frame installation, replacing traditional expansion tube systems in many European projects.
No plastic wall plug needed. After drilling pilot hole in concrete or brick wall, you directly drive self cutting screw into the hole. The hardened thread cuts thread into masonry. The whole installation process needs fewer parts and less labor work.
The screw head types include countersunk head and hex head. Countersunk head is widely used for window frame fixing to keep neat surface. Check screw length carefully to get enough embedment depth and stable holding force.