As someone in the Industrial and Scientific field, I have used a variety of collated fasteners and I must say these screws have been a game changer for me. According to my experience, Big Timber T 20 Drive Screws are excellent for outdoor use, especially for woodwork .They have a strong grip and do not rust easily. One downside is they are slightly expensive compared to other screws in the market. Overall, I highly recommend these screws if youre looking for durable and reliable collated fasteners..