I ordered this one more expensive than the others because they specified the length of the cut and not just stated the length and let me guess if it was the length. total length or cut length. This drilled the holes I needed through 2 chair legs, but the drill bit wasn't straight. When I threw him into my drill, he moved like a hula dancer. With a little bickering, drilling two chair legs 12 inches apart was fine, but if you were drilling through a thick joist or something the lack of straightness would be a problem and would create a lot more drag. a few sold to me were used or they are that bad right off the line.