How to pick the right pocket hole screw 👇 1. Length This is arguably the most important. For 1/2" lumber, use 1" Kreg screws. For 1x lumber, use 1 1/4". For 2x lumber, use 2 1/2". 2. Thread There are two thread options: coarse and fine. Coarse is for softwoods like pine and any plywood. Fine is for hardwoods like oak. If you use a coarse thread screw on a hardwood like oak, you're much more likely to split the wood. 3. Material There are three materials: zinc, blue-kote, and stainless steel. Zi