Features: <br>For the usage of MT shank, taper shank drills, reamers reducing. <br>The reducing drill sleeve is made from high quality 45# steel, sturdy and durable in use. <br>Adopts overall quenching process, long life, lasting, strong shock-resistance. <br>High accuracy, inside and outside are very smooth. <br>Easy to store and maintain, very practical tool. <br> <br> <br>Specifications: <br>Model: 1-2 2-3 3-4 <br>Material: 45# steel <br>Hardness: HRC58 <br>Size: <br> <br>MT1- MT2: length: 92mm / 3.62in, bottom hole diameter: 12mm / 0.47in <br>MT2- MT3: length: 112mm / 4.41in, bottom hole diameter: 17mm /0.67in <br>MT3- MT4: length: 133mm / 5.24in, bottom hole diameter: 23mm /0.91in <br> <br>Weight: 569g <br> <br> <br>Package included: <br>1 x MT1- MT2Taper Adapter <br>1 x MT2- MT3 Taper Adapter <br>1 x MT3- MT4 Taper Adapter <br> <br> <br> <br> <br> <br>Note: Please allow 1-3mm error due to manual measurement. Thanks for your understanding.<br>1、For the usage of MT shank, taper shank drills, reamers reducing <br>2、The reducing drill sleeve is made from high quality 45# steel, sturdy and durable in use <br>3、Adopts overall quenching process, long life, lasting, strong shock-resistance <br>4、High accuracy, inside and outside are very smooth <br>5、Easy to store and maintain, very practical tool