Fischer ULTRACUT FBS II is the ultimate game changer and is a better choice than expansion anchors! Its multiple re-uses, rapid installation, and less edge distance are some of it’s unique features. The teeth of fischer concrete screws create a positive-locking connection, transferring forces directly into the substrate without exerting any expansion pressure. Fischer ULTRACUT FBS II can be unscrewed twice for a total of 20 mm for alignment and provides excellent flexibility in the application w