I've been using this centering hinge for a month now and it has definitely improved the accuracy of my drilling in woodworking.based on my observations it is easy to use and helps me achieve perfect alignment of the hinges. The quality of the product is evident in its sturdy construction and precise centering capabilities. The only con is that it may not fit all drill bits, so make sure to double-check compatibility. Overall, a great addition to any woodworking toolkit..