This high-quality WIDIA bottoming tap is perfect for your metalworking needs. With a tap thread size of 5/16 in - 18, it is designed for precise and efficient tapping in Japan. Made from durable oxide/nitride 3FL H5 HSS-T15 material, it ensures superior performance and longevity. Whether you are a professional or a DIY enthusiast, this tap is a great addition to your collection. Its brand, WIDIA, is known for its excellence in the industry. It is ideal for use in various metalworking applications, including spiral flute taps, taps, metalworking supplies, and CNC, metalworking & manufacturing.