For wood project enthusiasts, hobbyists, and DIYers, the Kreg XL Pocket-Hole Screws are an affordable choice for pocket-hole joinery projects. Use the Kreg SML-C4X400-30 XL Pocket Screws, 4 Inch (30 Count) with Kreg's pocket hole jigs to create seamless, durable joints. These screws are compatible with Kreg Pocket-Hole Jig XL, the Jig HD, and 1 1/2 inches and larger stock. Use these screws to create joints that are twice as strong as regular pocket hole joints. This 30 pack of screws works well with softer materials such as plywood and composites. For moderate rust protection, these screws have a 3-layer Protec-Kote anti-corrosion coating, which helps to resist rust and makes these screws suitable for indoor and outdoor applications. With a 4-inch coarse thread, these steel screws with Maxi-Loc square drive heads are easy to drive into wood. The self-tapping tip eliminates the need for pilot holes, even in the hardest materials. The smooth, case-hardened steel shank turns freely for a tighter fit. The flat bottom head fits tightly against pocket holes. These screws will help you make secure pocket-hole joints in all your woodworking projects. At Kreg, woodworking is our passion. We take pride in a project well-done, and we understand how important the tools at hand are to the final product. That's why we craft the very best woodworking tools. We want our customers to feel confident in their ability to finish quality products with Kreg tools in hand.