Why I rate this product only one star. 1.Just with one screw driver you can install this but it takes 1+ hour which is not an easy installation, maker should focus on easy installation than old style joints 2.Eng wood was good quality considering the price but hole they made was not properly alligned to screw fit. 3. Metal plate provided for L joint was not 90 degree which you need to repair it before making join, need some tool like cutting player 4. Some place in wood had hole very near t...