A "6.5 Inch Borewell Drilling Service" refers to a service where a company drills a hole in the ground to access groundwater, with the drilled hole having a diameter of 6.5 inches, typically used when a larger volume of water is needed for large buildings, apartments, or agricultural purposes; essentially, it's a drilling service that creates a relatively wide borewell to access a larger water source.
Key points about 6.5 inch borewell drilling: