Deckfast Fascia Tool Pre-drills and Countersinks to the Correct Depth Every Time Independently Spun Stop Collars To Prevent Damage or Markings on the Fascia Creates an Oversized Hole for the Deckfast Fascia Screw to Allow for Expansion and Contraction Designed for PVC and composite deck fascia boards from 1/2 to 3/4 of an inch thick FOR USE WITH DECKFAST FASCIA SCREWS (SOLD SEPARATELY)