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• Undercut anchor for pre-positioned (FZA bolt version and internally-threaded anchor FZA-I) and push-through installation (FZA-D bolt version).
• A cylindrical conical hole with an undercut is produced with the Drill bit FZUB in one work process.
• When setting the anchor, the anchor sleeve is driven over the cone with a hammer (or setting tool) and fills the undercut hole with a positive fit.
• Also available: special version FZA ST A4 for man hole step irons according to DIN V 1211 GS / 1212 GS.
• A4 stainless steel version for outdoor use and in damp conditions, highly corrosion-resistant steel C (material no. 1.4529) for applications in aggressive atmospheres.

• Positive fit in the undercut gives additional safety.
• Virtually expansion-free operation allows cost-efficient fixing with very small edge distances and axial spacings.
• Single-step drilling process simultaneously produces the undercut, saving installation time.
• Green ring becomes visable when correctly set.