Stainless Flat Head Self Drill w/Wings 1/4-20 x 2-3/4" Torx Drive 100 Pieces. 410 Stainless steel coated with Strong Shield Coating ®. These self drillers will drill up to 3/8" steel. Ideal for fastening 2 x material to steel including trailer beds, columns and headers. The wings ream out the wood as you go and then break off when you hit the steel allowing the screw to tap it's own threads. WAR® coating tested to 1,000 hour salt spray test, suited for use with treated lumber. #30 Star Drive. Best results with high speed, impact drivers work well. Longer lengths available. FREE USPS SHIPPING! Other shipping options available at check out.
