Powerpro, LB, Clear, 12/14 x 1.5" OSB Roofing Fastener, Innovative Screw Designed For Backyard Sheds With Metal Roofs Attached To OSB Substrate, Wider, Aggressive Threads Provide More Bite & Hold In OSB, Improves Pull Out & Pull Through Versus Standard Roof Screws Used In Marketplace, Utilizes ST Powder Coating Technology.