Precision meets durability with the Hertel Extension Tap, designed for professional threading applications. This 1/2-13 UNC tap features 3 flutes with an H3 spiral point design that efficiently channels chips forward, making it ideal for through holes. Crafted from high-quality high speed steel with a bright, uncoated finish, this extension tap delivers consistent performance in various materials. The plug chamfer design allows for easier starting and produces complete threads to near the bottom of blind holes. With a generous 6" overall length, this tap provides excellent reach for deep holes and recessed areas. Engineered to 3B class of fit specifications, it ensures accurate and reliable threading results. The Hertel Extension Tap is a workshop essential for machinists and metalworkers who demand precision and reliability in their threading operations.