1/4" Phillips Flat Head Concrete Crete Flex Screw 410 Stainless Steel.

• 410 Stainless Steel
• Heavy-Duty, V-Notched Thread with Larger Crosssectional Area (25% Greater Than Other Commonly-Used Masonry Fasteners)
• #3 Phillips Flat Head Drive.
• Nail Point
• Dual Heat Treat Process
• Silver Stalgard® Corrosion-Resistant Finish
• Installed with a Commercial-Grade Hammer Drill or Rotary Hammer, a Specially-Sized Crete-Flex Carbide-Tipped Drill Bit, and a 1000 or Crete-Flex Installation Tool.
• Stainless Steel Crete Flex Tapcon Screws, Stainless Steel Concrete Screws, Stainless Steel Masonry Screws