VEVOR - Core Drill Bit, 4-1/4 inch Diameter, 9-1/2 inch Drilling Depth, 5/8-11 Internal Thread, Diamond Dry Coring Bit - Black

This professional core drill bit features a pilot drill and cutting teeth, crafted using high-frequency high-precision welding for fast, clean drilling. Featuring a 5/8-11 universal thread, it is compatible with various machines and is ideal for drilling into hard concrete and brick surfaces.