Dottie 36H214 - 3/16'' x 2-1/4'' Slotted Hex Washer Head Concrete Screw Anchor is made of carbon steel for use in poured concrete, prestressed concrete, cinder block, brick, and mortar. Designed for close to edge fastening with strong grip and corrosion resistance, featuring a blue Xylan finish. Includes 500 sleeve quantity, gimlet point type, and hex/slotted drive type for easy adjustment or removal. High-low thread type, hex head type, 1/4'' hex size, #2 bit size, 5/32'' x 4-1/2'' pre-drill size. Ideal for construction projects where durability and exact placement are crucial.