Wej-It Ankr-TITE Wedge Anchors are pre-assembled high strength, fully threaded, and torque-controlled expansion anchor has a unique safety shoulder in the expansion cone that supports a thick 3-dimple clip engineered to provide high load carrying capability and reduce slip in a variety of installation conditions. Nut and washer included. Bolt size is hole size the drill bit diameter needed for proper installation is the same as the anchor diameter.