Experience the precision of Helicoil with this 5521-5 / 5/16"-18 Coarse Thread Tap and Installation Tool. Designed for durability and accuracy, this tool is essential for any threading task. The set includes a tap and an installation tool, crafted to provide a secure and reliable thread every time. Note that the INSERTS are NOT included, allowing you to tailor the tool to your specific threading needs. Crafted with the quality you expect from Helicoil, the manufacturer part number 5521-5 ensures compatibility and performance. Whether you're a professional or a DIY enthusiast, this threading tool set is a valuable addition to your toolkit, offering a seamless installation process for your coarse thread applications.