Kreg's Pocket Hole Screws have a Maxi-Loc washer head screw design which provides a large amount of surface area on the head of the screw ensuring the screw seats securely in the bottom of the pocket. Coarse screws are for joining softwood, plywood & MDF. Use fine screws for hardwoods.
The Kreg Pocket Hole Screw kit has 150 each of 1" fine, 1" coarse, 1-1/4" fine, 1-1/4" coarse and quantity 75 of the 2-1/2" Coarse Blue-Kote weather resistant screws.