Quality construction and square right out of the box. Though you can adjust it, if it's ever needed, mine provided accurate cuts right from the start. High grade materials ensure that this miter gauge will last. Note, if you have the fence extended to its full length (approximately 31\"), you need to ensure you are pushing from the handle and not out to the far left. If you push from the left, there could be a slight deflection, given the distance from the base.