Ideal high load applications, such as hanging threaded rod for pipes or HVAC and close-to-edge fastening, these anchors are designed for quick installation into concrete, brick and block. Screw anchors are perfect for close-to-edge fastening because there is no expansion to put stress on the concrete edge. Unlike chemical anchoring or sleeved anchors, screw anchors can be removed with ease leaving the hole clear of debris, making a miscalculation less of a hassle. An increase in durability and reliability on installation of the Concrete Screw-Anchors, is a result of the dual-hardened body.