ITW TEKS DRILL POINT SCREW HEX HEAD PKG OF 400 21341 #12-14 X 1"" TEKS #12 X 1 IN. ZINC-PLATED STEEL HEX-HEAD SELF-TAPPING DRILL-POINT SCREWS PROVIDE SECURE METAL TO METAL FASTENING AND STRONG HOLDING POWER WITHOUT THE NEED TO PRE-DRILL. INSTALL WITH A STANDARD SCREW AND A 5/16 IN. HEX-DRIVE BIT (NOT INCLUDED). FEATURESUL STYLEMARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX; SECURE FASTENING WITH STRONG HOLDING POWERIDEAL FOR FASTENING 12 - 20-GAUGE METAL TO METAL IN HVAC AND ELECTRICAL APPLICATIONS FOR OVERHEAD STEEL DOORS HINGES AND LATCHES SELF-TAPPING ENGINEERED DRILL POINT AND FLUTE REMOVE MATERIAL EFFICIENTLY AND SIZE THE HOLE FOR THREADS