The fischer ZYKON internal threaded anchor FZA-I is an anchor made of stainless steel. The special drill bit FZUB is used to create the undercut drill hole in a single work step. The undercut anchor is set in the pre-positioned installation. The expansion sleeve is driven above the cone with the setting tool FZE Plus and fills the undercut drill hole with a positive fit. The fischer ZYKON internal threaded anchor FZA-I is ideal for fixing steel constructions, staircases, and temporary fixings within external areas in cracked concrete.