This 50-Pack of #10- 13 1-1/2 In. Pan Head Deck Screws are designed with tri-seal coating, extra coarse threads, and can be used in most exterior applications. Tri-seal coating resists corrosion from environmental elements and ACQ lumber. Gimlet point allows for easy application. Pan Head prevents over drilling, and conceals the screw. Extra deep thread design pulls screw more secure.