Rivet Shaver

This tool is the most expensive drill bit I've ever heard of.  Any guesses?

Here is what this expensive bit does:

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First, the olympic rivet shaft snaps off above the top of the rivet head on install with a rivet gun.
Second, the majority of the shaft needs to be snipped off.
Third, the rivet shaver goes to work.  It needs to be spinning full speed before touching the rivet.
Fourth, the spring-loaded bit touches down on the head and shaves the excess aluminum.
Last, the rivet head matches a bucked-style rivet.