Oreilet Core Drill Bit Adapter, 1-1/4in-7 Female Thread to 16mm Male Thread, Carbon Steel Core Drill Adapter Convertor, for Bits, for Concrete Coring

["Universal Compatibility: This adapter can seamlessly convert 1-1/4in-7 female thread to 16mm male thread, expanding the functionality of your coring drill and making it compatible with a variety of concrete coring drill bits.","Stable Connection: The core drill adapter ensures a secure and stable connection, allowing you to confidently perform drilling tasks.","Improve Efficiency: This core drill bit adapter can improve the accuracy and efficiency of drilling operations, which is a must have tool, convenient and practical.","Premium Construction: The core drill converter adopts premium carbon steel structure, which is long lasting and ensures long term stable operation.","Wide Usage: The adapter is optimized for drill bits, designed for compatibility and performance with drill bits of different materials."]