Robuta

https://www.fischer-international.com/en/products/steel-fixings/undercut-anchor/zykon-undercut-anchor-fza/accessories/60624-fzub-14-x-40 fischer ZYKON drill bit FZUB 14 x 40 Special drill bit for creating undercut drill holes in concrete for processing the Zykon undercut anchors FZA, FZA-I, and FZEA. Drill bit with stop plate and... drill bitfischerzykonfzubx