Based on our own experience with this product, we can definitely say that the screws are of top-notch quality. The black phosphate coating adds durability to the screws, making them perfect for use in industrial and scientific settings.The Phillips head design also makes it easy to screw them in without any hassle. However, the packaging could be better, as some screws were loose inside the pack. Overall we highly recommend these screws for anyone looking for reliable and efficient fasteners..