Fasco SCWC713FSEGSFP Electro Galvanzied Subloc Pro Scrail Nail Screw Fastener 15-Degree Wire Coil, 2-1/4 by 0.113-Inch Aggressive double threads for squeak-less sub oors Vastly improved holding power vs ring shank nails New head design to improve pull- through resistance Quickly driven with a pneumatic nailer Reduces the need for callbacks, saves cost for builders, and increases customer satisfaction