The Hillman Group 370981 Wedge Anchor, /4-Inch, X 3-/4-Inch, 30-Pack Product Description Power fasteners power stud anchor. Steel/zinc-plated. For use in concrete, stone, brick, and Block. Ideal for medium to heavy-duty loads. Drill hole same diameter as anchor. Exact hole depth is not required. From the Manufacturer The Power-Stud is a torque controlled, wedge expansion anchor that is designed for concrete applications. Has various DOT approvals including Cal Trans listing for "Stud Mechanical Expansion Anchors". It is building code approved, and can also be used with treated lumber. Features Power fasteners power stud anchor Steel/zinc-plated For use in concrete, stone, brick, and block Made in USA USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.