Fasco SCFP21220CTSEGGR Scrail Fastener  BeckDeck Thread 20-22-Degree Plastic Strip Winchester Grey Square Drive, 2.5-Inch x .120-Inch, 1000 Per Box The Faster Fastener! Install with the speed of collated nails, but with the holding power of screws Drives like a nail, holds like a screw Twice as fast as ordinary collated screws Eight times faster than bulk screws Can be used in most popular nailer's Saves time and labor costs