I had no idea THAT bit existed until I drilled over a hundred 5/8" holes in RR tie downs for attaching rebar along a 400 foot Span of our property line Using a paddle drill with a cordless drill I bought a REAL electric drill (DeWalt) and I use this drill to drill holes like butter - even creosote doesn't phase the drill or bit. Take your time and let the bit do its job, clean the hole often. No problem. Over 100 holes and the bit looks brand new. Impressed.