HILLMAN Screw-Bolt+ 1/2 in. D X 5 in. L Steel Hex Head Concrete Screw Anchor 10 Pk

Screw-Bolt+ anchors are a one-piece heavy duty screw anchor with a finished head designed for high strength anchoring. Parts have an attached washer with serrations under the head to secure the attachment. Design Improves speed and reduces effort for faster installation than traditional anchors.