Big Timber 5FHD12212#12 by 2-1/2-inch T-25-drive bit Flat Head Self Drill Star Drive Screws with Reamer Wings-Exterior,275 per Box

Bronze Coated Flat Head Self-Drilling Screws with Reamer Wings Exterior Screws T-25; #12 x 2-1/2" Thread Length: 1-3/4" Type #12 Screws