Sali Hardened Steel Core Drill Adapter Convertor 1-1/4"-7 Female To 5/8"-11 Male Size: The size design of this adapter allows it to easily convert 1-1/4 "-7 female threads to 5/8" -11 male threads, thereby increasing its flexibility and versatility, making it compatible with various specifications of diamond core drill bits Usage scenarios: The design of this adapter aims to improve the performance and accuracy of the core drilling rig, making it more suitable for drilling tasks of various materials. It can perfectly match with diamond core drill bits, ensuring excellent drilling results on various materials Universal compatibility: The adapter can convert 1-1/4 "-7 female threads to 5/8" -11 male threads, making the core drill more versatile and compatible with a wider range of diamond core drill bits. This universal design allows users to more flexibly choose the appropriate drill bit for work Improve drilling efficiency: This adapter can improve the performance and accuracy of the core drilling rig, thereby improving the efficiency of drilling. By using this adapter, users can complete drilling tasks faster and more accurately, improving work efficiency High quality materials: The adapter is made of high-quality quenched steel, ensuring its sturdy structure and long service life. This material ensures the stability and reliability of the adapter during long-term use, while also being able to cope with high-intensity working environments