The Hillman Group 375290 Hex Washer Head Slotted Tapper Concrete Screw Anchor, 3/16 x 3-1/4 Product Description RAWL brand. Concrete screw anchors. Hex washer head. 100-pieces per pack. Carbide bit included. Ceramic-coated. ACQ approved. From the Manufacturer State of the art thread design cuts into concrete. Tapper screws are designed for fastening applications in concrete, block, and brick. Use Tapper screws to attach electrical equipment, two by fours, downspout straps, hose reels, flag poles, hurricane shutters, and more. Tapper screws are perfect for indoor and outdoor use. For light to medium duty applications. Features Rawl Brand Concrete Screw Anchors Hex Washer Head From The Brand Name: The Hillman Group 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.