Kreg Zinc Pocket-Hole Screws SML-F150-500 are an affordable choice for pocket-hole joinery projects. This 500 pack of screws works well with harder materials and offers moderate rust protection. With a 1 1/2-inch fine thread these zinc 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 while the soft core prevents the screws from breaking snapping or bending while you drill. 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.