Metabo HM Core Drill 36x55 mm Weldon Shank 19 mm. The Metabo HM core drill is a high-quality tool for precise drilling. With a diameter of 36x55 mm and a Weldon shank of 19 mm, it is versatile in use. This core drill is suitable for smaller holes with a diameter of 14 to 60 mm as well as for larger holes starting from 70 mm. For the latter, a Weldon shank of 32 mm is required. To achieve optimal results, the Metabo HM core drill should only be used with the appropriate centering pin. In addition to standard steels, this core drill can also be used in higher alloyed steels, further enhancing its versatility. Included accessories: centering pin.