Hi Does anybody have any advice on what brand a good strong - sharp set of drill bits for drilling the heads of rusty old screws and bolts is - The drill bits I already had just span around till they get that hot they smoke and make little or no impression on the items I want too drill ,So I bought a set from ebay that the description led me to believe would simply slice through the bolts and screws like a hot knife through butter But they also failed ,So now I wonder what other people who have got a bit more experience than me in this situation might recommend