General Description This set of three Morse taper adapters is made from 45# steel, providing exceptional strength and durability for your DIY needs. With an accuracy of 0.015mm and a hardness of 50 HRC, these adapters are designed for optimal performance. Technical Specifications Material: 45# steel Accuracy: 0.015mm Hardness: 50 HRC Inner and Outer Diameters: MT1, MT2, MT3, MT4 Dimensions: MT1 - 18.6mm (outer) / 12.065mm (inner) / 90mm (length); MT2 - 24.7mm / 17.78mm / 107mm; MT3 - 31.6mm / 23.5mm / 132mm Compatibility and Accessories Compatible with machines using MT1, MT2, MT3, and MT4 Morse tapers. Ideal for drills, lathes, and other DIY tools. Installation: Morse taper adapters easily attach to your tools. Simply insert them into the chuck of the appropriate machine and tighten to ensure a secure connection. Usage: These adapters are perfect for DIY projects that require quick bit or tool changes. They allow for versatile and efficient use of your equipment.