Features High Quality 45# Steel: Made from durable 45# steel for long-lasting use, ensuring wear resistance and a long service life Strong Shock-Resistance: Adopts an overall quenching process for strong shock-resistance, providing reliability and durability in various working conditions High Accuracy and Fine Workmanship: Crafted with high accuracy and fine workmanship, ensuring smoothness inside and outside for precise and efficient tool storage Easy Storage and Maintenance: Easy to store and maintain, offering convenience and usefulness for daily tool organization Versatile Usage: Suitable for taper shank cutters, drills, and reamers, improving work efficiency and accommodating various tools Specifications:Material: 45# steelType: MT1 to MT2, MT2 to MT3, MT3 to MT4, MT4 to MT5(Optional) Hardness: 50 HRC Type: D(mm)*d(mm)*L(mm), External Taper(MT.NO.S), Internal Taper(MT.NO.T), Inner Hole Length(mm), Weight(g);MT1 to MT2: 17.78*12.065*92, 2, 1, 56, 89; MT2 to MT3: 23.825*17.78*112, 3, 2, 67, 174; MT3 to MT4: 31.267*23.825*140, 4, 3, 84, 350; MT4 to MT5: 44.399*31.267*171, 5, 4, 107,1000; Package Included:1 x Taper Drill Sleeve Note: 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. Package List