Black Reducing Coupling: 1 x 3/8", 150 psi, Threaded MPN:0311087209

This helical boring bar offers impressive features such as minimum bore diameter of 0.04 and maximum depth of 1/4 along with Right-hand cutting making it ideal for producing internal threads or smooth cuts accurately while working on difficult materials like stainless steel or hardened tool steels with ease. It is an excellent tool perfect for engineers, machinists or hobbyists needing high precision boring and reaming operations within confined areas owing to its compactness whilst delivering smooth cuts with minimum vibration ensuring quality finishes that last longer every time; hence, perfect for all your precision machining needs.