I have two different style of these bits, both greenlee's, both have the screw tip and I can't seem to get a bite on the wood I'm trying to drill through. Is it just me or do others have problems getting through with these? Maybe the style without the screw tip works better? Any suggestions for other products to get a hole through the floor to the basement when adding a new receptacle? This project is my pet peeve cause it just doesn't ever seem to go smooth. Many thanks, Ed.
