Hillman 3/16 In. x 2-3/4 In. Flat Head Tapper Concrete Screw (20 Ct.) 41568

Designed to fasten objects into concrete brick and block. Specially hardened high-low thread actually cuts thread into masonry materials. A simple 2-step operation drill then drive. Tappers may be removed and re-inserted in the same hole. Use for window installations interior hand rails metal door frames storm shutters interior lighting fixtures thresholds or screened enclosures. Clamshell packaging. Thread Diameter: 3/16 In. Length: 2-3/4 In. Head Type: Flat Head Material: Steel Finish: Corrossion-Resistant Blue Climaseal