The Torq-Cut self-undercutting anchor is a heavy-duty, high-capacity anchor designed and tested for use in cracked and uncracked concrete under static and seismic loading conditions. A built-in ring with hardened cutters expands with installation torque forming undercut grooves in the concrete. The interlocking connection between the anchor and the concrete provides high load-carrying capacity. Simpson Strong-Tie Anchor Systems. 800-999-5099.