Simpson Hex Head Titen Turbo™ Concrete and Masonry Screw Anchor Zinc Plated with Ceramic Coat Blue is a high performance fastener designed for improved grip and resistance to corrosion. Measuring 1/4 inch by 5 inches, it provides superior holding power in masonry and concrete. With a strong 5/16 inch hex head, these anchors come in a box of 100.