Enhance your machining precision and efficiency with this high-quality Taper Drill Sleeve, crafted from durable 45# steel. Featuring an overall quenching process, this adapter offers exceptional shock resistance and long-lasting wear performance. Precision ground both inside and outside, it ensures high concentricity and smooth surfaces for reliable, accurate tool holding. Designed for use with taper shank cutters, drills, and reamers, this sleeve improves work efficiency by securely adapting different taper sizes for versatile machining applications. Key Features: · Premium 45# Steel Construction: Provides excellent durability, wear resistance, and a long service life for demanding industrial use. · Heat Treated for Strength: The overall quenching process enhances shock resistance, ensuring stability under high-torque conditions. · High Precision and Smooth Finish: Fine workmanship with precision grinding inside and outside guarantees high concentricity and smooth tool fitting. · Versatile Compatibility: Suitable for taper shank cutters, drills, and reamers, facilitating quick and secure tool changes to boost productivity. · Multiple Size Options: Available in four types (MT1 to MT2, MT2 to MT3, MT3 to MT4, MT4 to MT5) to meet a variety of machining needs. · Easy to Store and Maintain: Compact design simplifies storage and maintenance, making it a practical addition to any workshop. Specifications: · Material: 45# Steel · Hardness: 50 HRC · Types Available: MT1 to MT2, MT2 to MT3, MT3 to MT4, MT4 to MT5 · Dimensions and Weights:  - MT1 to MT2: Outer Diameter 17.78mm, Inner Diameter 12.065mm, Length 92mm, Weight 89g  - MT2 to MT3: Outer Diameter 23.825mm, Inner Diameter 17.78mm, Length 112mm, Weight 174g  - MT3 to MT4: Outer Diameter 31.267mm, Inner Diameter 23.825mm, Length 140mm, Weight 350g  - MT4 to MT5: Outer Diameter 44.399mm, Inner Diameter 31.267mm, Length 171mm, Weight 1000g Package Includes: · 1 x Taper Drill Sleeve This Taper Drill Sleeve is an essential tool adapter for machinists seeking precision, durability, and versatility. Its robust construction and high accuracy make it ideal for demanding machining tasks, enhancing the performance of taper shank tools while ensuring secure and stable tool holding in various industrial applications.