Heavy duty anchors use in the concrete tension zone (cracked concrete). High load capacity, and force-controlled expansion which allows for follow-up expansion. Suitable for dynamic loading, including seismic1, fatigue and shock. No spinning of the anchor in hole when tightening bolt or nut. It can be disassembled so that the surface is smooth (the expansion tool and cone remain inside the drill). Variety of lengths and metrics, flexibly of installation.