Designed As An Alternative To The Traditional Coach Screw. This Heavy Duty Screw Dramatically Decreases Installation Time As It Doesn’t Require A Pilot Hole Into Most Wood Types. This Screw Is Ideal For External Applications Or Where Extra Strength Is Required. Coated With A Patented Multi-Layer Corrosion Resistant Plating To Withstand 1 000 Hours Salt Spray Test.PTDTIM10130INI