Star Drive Bugle Head Deck Screws 305 Stainless Steel.

Deck-Drive DWP Wood Stainless Steel Wood Deck Screws
The Deck-Drive DWP Wood SS screw is a powerful fastening solution for deck, dock and general exterior applications where extra corrosion protection is needed.
With its specially-designed sharp-point and unique box-threads, the DWP is ideally suited for the majority of wood used in today’s deck boards.
Type 305 stainless steel for many applications
D6-Lobe Bit Replacements: T-20 or T25
Check out the link to Simpson Strong-tie for additional information: