Atoplee MT2 to MT3 Morse Taper Drill Sleeve Reducing Adapter for Lathe Milling Part Material: 45# steel Accuracy: 0.015mm, Hardness: 50 HRC Inside Taper No. : MT2*MT3 * outside Taper No.: MT2*MT3 *Outer diameter : 24.7mm *inner diameter : 17.78mm *full length:  107mm Made from high quality 45# steel. For the usage of Morse taper shank, taper shank drills, reamers reducing. Adopts overall quenching process, long life, lasting, strong shock-resistance. High accuracy, inside and outside are very smooth. Easy to store and maintain, very useful. Package Included:1pc MT2 to MT3 Morse Taper Adapter