Saw these at Home Depot the other night. They look more like an "unserviceable" self feed bit (unserviceable meaning you can't remove the pilot bit to replace it with a new one) with a bit different of a cutting body, sort of like a cross in the cutting body of between a spade bit and a self feed bit. The thing that hit me was if they would perform like a self feed bit, and also the price - they are like a 1/6 of the cost of a self feed bit. Considering most self feed bits, the ones I use anyways, rarely seem to make it to the point where I can change the pilot because the cutting body of the bit is thrashed from hitting the odd nail drilling through plates and such, thesse might make a more reasonable compromise.
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