The Hillman Group 561028 Hwh Neo Tek 10-16x1

Self Drilling screws are specifically designed to fasten metal sheeting with out drilling and have self tapping threads to provide a stronger grip to your surface. These drill into the roof to remove material and have a neoprene washer provide a water tight seal. These screws have a ceramic finish that is corrosion resistant and recommended for use for treated woods. * Neoprene Washer for water proofingSelf Piercing screw for metal and wood applicationsMetal finish for metal sheetingNo need to pre-drill a hole