Size: This drill converter has a 5/8inch-11 threaded connector designed for SDS Plus drills which can be perfectly adapted to mainstream core drills and the compact design of 72mm total length and 15mm diameter reduces vibration transmission and reduces the risk of fracture suitable for both industrial and daily use Multi Scenario Applicability: This adapter can be used for connecting core drill bits and electric drills which can be used for various hard materials such as concrete brick walls ceramics etc. It can easily complete tile drilling and other tasks in home and meet the needs of concrete slotting and other requirements during construction Durable Material: This core drill bit converter is made of high-quality steel which is very sturdy and durable not easily deformed or broken. Even after a long drilling work it will not have obvious deformation or damage making it suitable for professional construction personnel to use repeatedly Easy to use: The core drill bit adapter can be quickly installed without the need for additional tools. When installing tighten the core drill bit at the threaded end then align the long handle end of the adapter with the drill interface and push it vertically to tighten. Even novice users can quickly complete tool integration Stable Connection: This steel core drilling converter has a scientific structural design to ensure safety during use. The thread shape can ensure a tight connection of the drill bit and prevent it from falling off during vibration. It's overall structure can disperse the impact force received and avoid local fracture