Perlok Standard #12 Phillips Head Insulation Screw comes with below features:

• Specifically designed to secure insulation and roofing membrane to 18 to 22 gauge steel, wood or structural concrete decks
• Fasteners have an epoxy based coating to enhance corrosion resistance
• Heavier shank and buttress thread diameters for increased pullout resistance
• Extra sharp spade point for quick installation in new or reroof applications