I've attached a photo of a tip tool. What's the purpose of the center portion between the two prongs? When I purchased it (online), I thought there were blades in there so you can spin the tip between the two prongs and it would shave off the mushroomed portion of the tip. But there is no blade. It's just smooth metal on the inside of the prongs. Seems like a POS to me...anyone want it? lol