DRILL BIT 70mm DIA LENGTH 50mm(PART NO 240150N)

A 70mm diameter core drill bit with a 50mm cutting depth (the length is likely referring to the cutting depth, as a total length of 50mm for a 70mm diameter is not a standard size) is a specialized tool used for creating large, clean holes in various materials. Based on the specifications, including the part number, this is likely a Tungsten Carbide Tipped (TCT) core drill bit.