The Kreg 1-1/2-Inch #8 Coarse Pocket Hole Screws with Washer-Head, 100 pack, features a deep #2 square drive, a needle-point self-tapping tip, and a case hardened design built for strength. The washer head seats flush in the bottom of the pocket, eliminating pull through, and the larger threads provide maximum holding power. Great for softer materials like pine, plywood, particle board, MDF and melamine. Kreg pocket-hole screws increase the strength of a pocket-hole joint. Cut-thread pattern prevents splitting. Coarse thread is for any combination of softwoods, plywood, and composites, and fine is for hardwoods.