12-15-2010, 11:53 AM
One more thing you need is quality drill bits. If your drill bits bend instead of shattering when they fail, they are not hard enough to do the job! Harbor Freight as well as the "big box" stores have cheap drill sets that they sell for customers who buy totally based on price. If you need to drill into something hard, you need to buy a drill or drill set based on quality of the material rather than the price.