Dottie 14H334 - 1/4'' x 3-3/4'' Slotted Hex Washer Head Concrete Screw Anchor is made of carbon steel and ideal for poured concrete, prestressed concrete, cinder block, and brick applications. Featuring a blue Xylan finish, high-low thread type, and hex drive type, this anchor offers strong grip, corrosion resistance, and ease of adjustment or removal. Suitable for close to edge fastening, it is case hardened with a gimlet point type and pre-drill size of 3/16'' x 5-1/2''. Includes 500 sleeves.