Have you all used one these

[benmychree]

I see the reamer has a center drill on its end. Would you try to "guide" this reamer in use, like you would do with a tap?

The center drilling in the ends of the reamer are used in manufacturing the reamer, likely for turning milling flutes, and finish grinding and grinding the clearance on the reamer. Also I note that nobody posting this says anything about using cutting oil when preforming these cleanup jobs; I'd use Tap Magic for any sort of reaming, or any other machining job where lube is used, for that matter.