the expansion mechanism compresses and exerts force against the walls of the hole

acceptable for ACQ pressure treated lumber

#53 Heavy Duty Jobber Drill Bit

Low-profile head

1 1/4-7 x 10 Socket Cap Screw Alloy

8 x 3/4 Square Flat Particle Board Screw w/ Nibs T17 Zinc Plated - Carton (10,000) 5/8 Hex Lag Screws Hot Dipped Galvanized the expansion mechanism compresses and8 x 3 4 Square Flat Particle Board Screw w Nibs T17 Zinc Plated Carton (10,000). Wood screws used for interior wood applications. Asymmetrical thread pattern resists material slippage during pull out and vibration. Counter sinking NIBS for a flush finish. Type 17 tip reduces wood splitting. Superior holding power.