When you have a serious project that needs to be done, look no further than Hollow Boring, Inc., the leader in Deep hole drilling and boring. Hollow Boring, Inc. was founded in 1978. We are experienced at drilling holes in mold plates and manifold plates. Our machinery has the capability to drill on-center or off-center and maintains high accuracy using digital positioning.Rounds or hex bars, castings of any size, shape or configuration. Ferrous, non-ferrous metals and most alloys are no match for our deep hole drilling abilities.We can do both short and long production runs.