3/8" hexagonal Core Bit Adapter 

Raizi core bit adapter is designed for M14 Europe, 5/8"-11 USA male threaded diamond hole drill bit, this 3/8" hexagonal shank fits on most power drills. If you only have power drill but no angle grinder, it is a good choice.

Specification:

• Diamond core drill bit adapter hexagonal 3/8" (10mm) to M14 Europe, 5/8"-11 USA male threaded for core drill bits hole saw
• Connects to core bits with M14, 5/8"-11 threaded female arbor, and changes to connector to 3/8" hexagonal
• High quality hardened alloy, Adapter for Drilling and Grinding Concrete, Glass, Granite, Stones
• Overall length: 60 mm, Shank length: 35 mm

Note: M14, 5/8"-11 male length 16mm - Overall length 60 mm. Check if fits your application before buying