The fischer ZYKON undercut anchor FZA is an anchor made from zinc-plated steel stainless steel, and highly corrosion-resistant steel. The undercut anchor is ideal for anchoring façades, railings and steel constructions in cracked concrete both inside and outside. fischer offers the FZA as a bolt anchor, push-through anchor, internal threaded anchor and step iron anchoring. The undercut drill hole is created in a single work step with the special drill bit FZUB. The undercut anchor is set in a pre-positioned installation. With the setting tool FZE Plus, the expansion sleeve is pressed over the cone and fills the undercut drill hole in a positive-locking manner. This ensures top safety even for large crack widths.