Hillman
For all masonry materials. 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. Clamshell packaging.
Monster Fastener Zinc Plated Steel Hex Bonded Washer Head Self-Drilling Screws
Monster Fastener Zinc Plated Steel Phillips Modified Truss Head Sharp Point
Monster Fastener Zinc Plated Steel Modified Phillips Truss Head Self-Drilling Screws
Blue Point .27 Caliber Long Strip Loads
Monster Fastener Zinc Plated Steel Hex Washer Head Self-Drilling Screws