Screw-Bolt+ anchors are a one-piece heavy duty screw anchor with a finished head designed for high strength anchoringMADE OF CASE-HARDENED STEEL: Designed to maintain ductility when cutting through concreteDiameter, length, and product marks embossed on head for quick identificationDesign Improves speed & reduces effort for faster installation than traditional anchorsParts have an attached washer with serrations under the head to secure the attachmentREMOVABLE AND REUSABLE: These anchors are removable and reusable for more convenience and valueANSI-COMPLIANT: Designed for standard ANSI tolerance drill bitsICC CODE APPROVED: Code listed for ICC-ESR 3889 Concrete & ICC-ESR 4042 MasonryCode listed for ICC-ESR 3889 Concrete & ICC-ESR 4042 MasonryMade of case-hardened carbon steel with zinc plating according to ASTM B633These zinc-plated Screw-Bolt+ anchors measure 1/4" in diameter x 1-3/4" in length