The Hillman Group 371928 Wedge Anchor, 3/8 X 2-3/4-Inch, 50-Pack Product Description The Hillman Group Wedge anchor is a torque-controlled expansion anchor and is an excellent choice when anchoring into solid concrete. This type of concrete anchor is designed for use in concrete only and should never be used in block or brick base material. Once installed, these wedge anchors cannot be removed without destroying the concrete. Tools required: 3/8? carbide tipped drill bit, hammer drill, 9/16? wrench; Maximum thickness of the fixture or material being fastened is 3/4"; Minimum embedment into the concrete is 1-5/8?; Threaded portion of the anchor is 1-3/8? in length; The required installation torque of the anchor is 20 ft./lbs. 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 APPLICATION: Used to fasten a variety of materials to concrete in dry environments MATERIAL: Manufactured from carbon steel with a zinc plated finish DIMENSIONS: 3/8-16 x 2-3/4? PRE-DRILLING REQUIRED: Hole diameter is equal to anchor diameter PACKAGING: 50 pieces per box and is packaged with the correct quantity and diameter of nuts and washers 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.