Quality Material: Crafted from sturdy steel, this core drill bit adapter ensures long-lasting performance and reliability in various applications. Precise Thread Conversion: This core drill adapter is designed to convert M16 or M22 threads to 1-1/4-7, making it versatile for different threading needs and compatible with a wide range of equipment. Compact Size: With a length of 85mm, this thread adapter for diamond drill core bits is compact yet efficient, allowing for easy installation and integration into your existing setup. Improved Drilling Precision: Enhance the accuracy and efficiency of your drilling operations with this essential core bit adapter. Versatile Application: Ideal for use in industrial settings or DIY projects where specific thread conversions are required, providing flexibility and convenience. Size: 8.5 cm (3.35 inches) Package Includes: 1 piece M16 to 1-1/4"-7 core drill adapter or 1 piece M22 to 1-1/4"-7 core drill adapter with 3 pieces rod Note: Please allow slight variations of 1–2 cm due to manual measurement.