what is the easyest way to drill through stone or ledge (solid rock) for a fence posts? i am going to price a fencing job but i know most likely im going to hit rock and ledge, what is the the best way of doing this? what type of machine would an auger with a stone bit work or a an auger on a bobcat witha stone bit, or any other suggestions. what can be rented (not worried about cost to much). i was thinking a jack hammer of some type but how much work would that be and would it work for 2-3 feet? i have to to 50-60 2-3ft holes about 10" x10" each. thanks for your help!!!