Morse Taper Shank Drill Chuck Arbor Threaded. Precision ground, Made of high quality Steel, Used in Machining applications. THreaded Mount and Taper Shank. Shank to Taper Runout <0.0001". HIGHEST ACCURACY: Precision Ground HIGHEST TOLERANCE: Taper to Shank Runout < 0.0001" Shank Taper: Morse Taper Mount Taper:Threaded HIGH QUALITY STEEL: Made of High Quality Hardened STEEL China Manufacturer 100% Guarantee to be Free from any Manufacturing Defects. 100% Customer Satisfaction Guarantee