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HST4 is a performance concrete wedge expansion anchor used to resist static and seismic structural loads in the construction industry (residential, industrial, infrastructure, etc.). The HST4 carbon steel variant of the HST4 family is described further in this report. For the placing of the product on the market in the European Union European Free Trade Association EU/EFTA) (with the exception of Switzerland) Regulation (EU) No. 305/2011 (CPR) applies. The product needs a declaration of performance taking into consideration the following European Technical Approval ETA_21/0878 assessed based on EAD 330232_01_0601_v03 Mechanical fasteners with variable embedment depth for use in concrete. For the application and use the respective national provisions apply The Hilti HST4 anchor is a torquecontrolled expansion anchor made of carbon steel which is installed into a drilled hole and anchored by torque controlled expansion