Dottie 36P214 - 3/16" x 2-1/4" Phillips Flat Head Concrete Screw Anchor is made of carbon steel with a blue Xylan finish for corrosion resistance. It is designed for close to edge fastening in poured concrete, prestressed concrete, cinder block, brick, and mortar. Features high-low thread type, gimlet point type, and can be loosened for adjustment or removal. Perfect for applications requiring strong grip and reliability. Includes 500 sleeve quantity, Phillips drive type, 5/32" x 4-1/2" pre-drill size, and #2 bit size.