Hillman 372225 Screw-Bolt+ Anchor (1/2" x 4"), White Made of engineered steel designed to maintain ductility when cutting through concrete. Diameter, length, and product marks embossed on head for easy identification. Dust-relief thread profile improves speed reduces effort for 22% faster installation than traditional wedge anchors. ANSI standard bit designed for ANSI carbide drill bits. Integrated washer with serrations under the head to secure the attachment. Features Made of engineered steel designed to maintain ductility when cutting through concrete Diameter, length, and product marks embossed on head for easy identification Dust-relief thread profile improves speed reduces effort for 22% faster installation than traditional wedge anchors ANSI standard bit designed for ANSI carbide drill bits Integrated washer with serrations under the head to secure the attachment 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.