10 inch core drilling for 8 inch pipe

This is a not so flattery picture of one of our faithful core drill operators drilling a hole in a water basin the new West Cabarrus High School being constructed on Weddington Rd, Concord, North Carolina. Our 10 inch core drill bits are embedded with 10 mm. diamond teeth that easily cuts strait thru rebar in most of the underground drainage systems concrete boxes installed in most of the south where soil is decently firm.