This item arrived with about half the cutting edges on the five center drills clearly blunt. This was presumably either because they crashed into each other during shipping in poorly designed packaging, or because they were dumped in a trash can at a manufacturing facility along with 500 other center drills. I don't care why, but if the supplier who packs them reads this, they can reduce returns by using a piece of foam (in a plastic container) big enough to hold the individual center drills. in the appropriate sections.