#20 x 3-3/4 in. Flat-Head Phillips Coarse-Thread Self-Drilling WAR-Coated Head Reamer w/ Wings (500 Pack) | STP-R334W

Strong-Point consists of a variety of high-end fasteners including Self-Drilling, Drywall, Stainless Steel, Needle Point, Woodworking, Pole Gripper, Outdoor, Concrete, and Cement Board screws. Strong-Points screws and fasteners are made of premium carbon and stainless steel fasteners, and any item may be returned due to defective workmanship or materials.

• Meets ASTM C 1513 for cold-formed steel framing connections
• Meets F.I.P.-1000.7 for torsional strength & drill speed
• For use in pressure treated lumber
• Wings ream hole in wood preventing 'jacking action'?
• Used for attaching lumber or headers to steel