Matt these work wonderfull..........
http://www.harborfreight.com/cpi/cta...emnumber=92115
http://www.harborfreight.com/cpi/cta...emnumber=36567
http://www.harborfreight.com/cpi/cta...emnumber=36568
http://www.harborfreight.com/cpi/cta...emnumber=92148

I prefer the first one that looks like a drill......