Tommy's technique of locating a stud on which to hang a cabinet (2/10/2013) seems seriously flawed. Knocking on wood and then drilling a small hole could result in setting a larger screw maybe 1/16 of an inch from the side of the stud. This would result in a weak and dangerous installation. Why is he opposed to a stud finder device? There are ones that indicate the span of the stud. I have one.