The Drill Bit Jams

When a  drill bit comes into glancing contact with a material it is unable to cut, it may bind up in the hole and you may not be able to remove it. When this happens, unplug the rotary hammer and remove the bit from the drill. Using a special type of wrench called a Stillson wrench, turn the drill bit counter clockwise to remove it from the hole. Once the bit is removed, the blockage should be cleared with a pointed masonry punch or a concrete nail.