Simpson #8 x 1-5/8" 305 SS Deck-Drive DWP Wood Screw, T20, Flat Head Power-Stud What does the checkered head

What does the checkered head pattern offer beyond standard nail heads

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26 is a pair of bore reducers to adapt cutter heads or saw blades from 1-1/4" bore to 1"

Simpson #8 x 1-5/8" 305 SS Deck-Drive DWP Wood Screw, T20, Flat Head Power-Stud What does the checkered headSimpson #8 x 1 5 8" 305 Stainless Steel Deck Drive DWP Wood Screw by Simpson is engineered for deck, dock, and general exterior fastening applications where reliable corrosion protection is a priority. Featuring a specially designed sharp point and unique box thread profile, this flat head wood screw drives cleanly into the majority of wood used in today's deck boards reducing driving torque and extending battery tool runtime. The Type 305 stainless