These zinc-plated pocket hole screws from Kreg are a solid, affordable choice for indoor projects with limited exposure to the elements. They feature self-tapping tips with a fine thread pattern designed to eliminate splitting, and are ideal for a variety of tasks, including face-frame assembly. The pan-head is slightly smaller than a washer head, making it the preferred choice for extremely hard woods or thinner material such as 1/2'' stock. Pan-head screws also have a smaller shank diameter, which further reduces the chance of splitting. Chrome/zinc finish resists corrosion. Heat treated.