ITW Buildex Part Number 1000000, Teks® with Bonded Washer Steel-to-Steel Self-Drilling Screws - TEKS® 5 HWH/BD CL 12-24 X 1-1/4"Teks Drill PointNon-walking, cutting edges, pigtail reductionEngages material faster, drills with less effort, safer installationEPDM washer with vulcanized bondingProvides water tight seal and eliminates separation from the metal backingPrevents leaksClimaseal®Coating provides long life protectionFewer replacementsIntegrated Drill Point & Tapping ThreadsQuick transition from drilling to tappingLower installation torque