| It's probably not the bit, but the drill. For a few bucks you can rent an SDS+ hammer drill (that's a type of drill, not a brand name) and 3/4 inch bit from a rental yard and have all the holes drilled in about 5 minutes. Normal drills with masonry bits, and typical hammer drills are worthless toys compared with this type of drill. You can buy a Bosch Bulldog at Lowe's for around $140, but I'm sure you can rent one much cheaper.
good luck.
Pecos |