said by pende_tim:said by lawsoncl:so it doesn't grab the carpet fibers as you drill
Very good advice. Yes those carpet fibers WILL get caught and pull off the rug backing.
A trick an electrician taught me, drill using a length of stiff wire (he had a few insulation supports in his kit). Load it right in your chuck and drill away. It won't catch carpets, it's stiff enough to drill through wood and long enough to let you know where you will come out. Makes a small enough hole that won't really be noticeable...