1Made from high quality 45# steel, durable, wear-resisting and long service life 2Adopts overall quenching process, strong shock-resistance 3High accuracy, fine workmanship, inside and outside are very smooth 4Easy to store and maintain, very useful. There are 4 types for your choice 5For the usage of taper shank cutter, taper shank drills, taper shank reamers, improving work efficiencyDescription: _x000D_These adapters are made from high quality steel, hardened and tempered, precision ground inside and outside for high concentricity. Taper shank allows the tool to be inserted directly into the machine's spindle to facilitate high-torque applications such as large cut diameters. _x000D__x000D__x000D_Features: _x000D_Made from high quality 45# steel, durable, wear-resisting and long service life. _x000D_Adopts overall quenching process, strong shock-resistance. _x000D_High accuracy, fine workmanship, inside and outside are very smooth. _x000D_Easy to store and maintain, very useful. There are 4 types for your choice._x000D__x000D_For the usage of taper shank cutter, taper shank drills, taper shank reamers, improving work efficiency._x000D__x000D__x000D__x000D_Specifications: _x000D_Material: 45# steel _x000D_Type: MT1 to MT2, MT2 to MT3, MT3 to MT4, MT4 to MT5(Optional)_x000D__x000D_Hardness: 50 HRC _x000D_ _x000D_Type_x000D_D(mm)_x000D_d(mm)_x000D_L(mm)_x000D_External Taper _x000D_(MT.NO.S) Internal Taper _x000D_(MT.NO.T) Inner Hole Length(mm)_x000D_Weight(g)_x000D__x000D_MT1 to MT2_x000D_17.78_x000D_12.065_x000D_92_x000D_2_x000D_1_x000D_56_x000D_89_x000D__x000D_MT2 to MT3_x000D_23.825_x000D_17.78_x000D_112_x000D_3_x000D_2_x000D_67_x000D_174_x000D__x000D_MT3 to MT4_x000D_31.267_x000D_23.825_x000D_140_x000D_4_x000D_3_x000D_84_x000D_350_x000D__x000D_MT4 to MT5_x000D_44.399_x000D_31.267_x000D_171_x000D_5_x000D_4_x000D_107_x000D_1000_x000D__x000D__x000D__x000D__x000D_Package Included: _x000D_1 x Taper Drill Sleeve _x000D__x000D__x000D_Note:_x000D_Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.