Shop for Hardware at The Home Depot. Hilti's line of Kwik Bolt Tension Zone Carbon Steel Expansion Anchors are excellent for use in a variety of base materials, such as concrete (cracked), concrete (light weight), concrete (light weight over metal deck), and concrete (untracked). These Kwik Bolt Tension Zone Anchors are most commonly used for fastening structural steel, facade, mechanical equipment, hand rails, and racks. Professionals know the importance of qualified, reliable anchors, and Hilti knows how to meet professionals' needs. Get the concrete Anchors that professionals use: The Hilti Kwik bolt Tension Zone carbon steel expansion anchors.