Anti-Split - Fast Drive Elite Performance Woodscrews. Elementech 400 Surface Coating Provides Corrosion Resistance. Salt Spray Tested To 400 Hours. A Non-Cr Cr3+ Yellow/Zinc Plated Surface Is Environmentally Friendly. Lasts Up To 6 Times Longer Than Standard Zinc Screw Protective Coating. Double Cutting Point Reduces Splitting And Drive Time. Capable Of Penetrating 0.8Mm Steel. Serrated Cutting Reduces Torque For A Faster Firmer Fix. Improved Pull Out Provided By A Serrated Cutting Thread. Reinforced Countersunk Neck Provides Holding Power. Improved Countersinking From 6 Angled Lobes. Anti Friction Prevents Jacking Rotation And Splitting. Suitable For Interior Use.PTDFORDIRFFP640Y