1、SPECIFICATIONS: Morse taper drill sleeve, with an inner taper of MT1 and an outer taper of MT4, used for taper shank drill bits reducing. 2、EXCELLENT STEEL: The drill sleeve adapter is made of excellent 45 steel, with overall quenching, has excellent impact resistance and service life. 3、APPLICABLE TOOL: This reducing drill sleeve is suitable for Morse taper shank cutter, taper shank drill, taper shank reamer, etc., simple and practical. 4、GOOD PERFORMANCE: This morse taper drill sleeve has a 0.015mm high accuracy and a 50HRC hardness, ensuring stable and reliable operation. 5、FINE PROCESSING: With fine workmanship, this reducing drill sleeve has high internal and external smoothness, will not scratch other parts during use.