For use on CNC drill banks and portable machines. Durox style thru hole drills have superior geometry over industrial and proline drills to prevent chipping on brittle delicate laminates. Thru-hole drill minimizes chipping on exit hole on laminates, particle board, MDF and solid wood. Carbide tipped for long life. Screw in the end for height adjustment, 10mm shank with flat for set screws.