Kreg 125-Pack 2-1/2" #8 Blue-Kote Pocket-Hole Screws are made with 3 anti-corrosion layers and provide rust resistance up to 400% greater than zinc plated screws. They are also compatible with pressure treated material. Kreg screws are built with a wide variety of unique features which work together to ensure the strongest possible joint, the easiest possible driving and the smallest chance of splitting. Choosing Kreg screws means you expect the best possible results, but to get those results you'll have to choose the best Kreg screw for your particular project. Blue Kote Screws are made with an anti-corrosion layer that helps defend against the outdoor elements.