This 18-piece tap and drill set from Drillco Cutting Tools combines versatility and durability, featuring both through and blind hole capabilities for a wide range of applications. Constructed from high-speed steel and finished with black oxide, the nitro tap and drill enhance performance and longevity, making them ideal for various materials. Designed under the Series 400N, this set is a reliable choice for professionals seeking precision and efficiency in their drilling tasks. Whether you're in a workshop or on the job site, this comprehensive tool set will provide the quality and reliability needed for effective machining.