I am an engineer that operates and maintains a large cogen power plant. I own and am experienced in just about any tool you can imagine. This unit is a DISASTER!! The booklet sent as "instructions" is not only useless but if followed could lead to a catastrophic injury. The wall anchors and screws DO NOT DO TOGETHER thereby creating a DANGEROUS situation. Having a working knowledge of these these anchors prompted me to stop and proceed to the store to pick up proper anchors and screws. You also need ADVANCED knowledge of using levels, drills, stud finders and computing fractions. In short....DON'T BUY THIS EXCRUCIATING HEADACHE INDUCING PIECE OF BRAIN MELT!! It just isn't worth it.