1 1/4in UNC Male Thread to Round Shank Coring Drill Bit Adapter Carbon Steel 1 1/4in UNC Coring Bit Feature: 1. Expanded Compatibility: Seamlessly adapt from 1 1/4in UNC male threads to for Plus round shanks, easily connecting coring drill bits for efficient drilling performance. 2. Enhanced Structure: Constructed from carbon steel, our coring drill bit adapter ensures durability and long lasting performance, making it suitable for demanding drilling tasks. 3. User Friendly Design: This concrete adapter simplifies your drilling process with its intuitive design, allowing for easy connections that ensure smoothly and efficient use every time. 4. Secure Connection: Experience peace of mind knowing our coring drill bit adapter provides a secure and stable connection, allowing you to perform drilling tasks safely and confidently. 5. Optimized for Performance: Specifically designed for rotate mode, our adapter prioritizes safety and performance by avoiding hammer mode, protecting your tools and workpieces during use. Specification: Item Type: 1 1/4in UNC to Round Shank Coring Drill Bit Adapter Material: Carbon Steel Shank Type: Round Shank ( for Plus) Thread Size: 1 1/4in UNC male thread . Package List: 1 x Coring Drill Bit Adapter