Sorby Pair Thread Cutting Tools, 20 TPI are designed to help you create beautifully threaded turnings such as lidded boxes with precision and ease. This pair of Robert Sorby tools features a unique enhanced helix angle specifically engineered for wood, ensuring smooth and accurate cutting results every time. The set includes both male and female thread cutters, allowing for ly matched threads. Crafted with high-speed steel blades and ash handles, these tools durability and comfort during use. For optimal performance, the optional Relief Tool and Tool Support accessories are . Detailed instructions are provided to guide you through the threading process, making it accessible for both beginners and experienced woodturners. Made in England. Model Number: B890201