Those tools are very useful. I have a ratcheting screwdriver with the different tips that are stored in the handle and use that a lot. I carry the smallest of the Swiss Army knives because it fits easily in the pocket and I use in multiple times a day, every day. That is probably the best EDC item I can imagine. You can't beat a Leatherman for more complex projects, heavier duty use. I bought my dad one in the early 90's when they were still made in Oregon and got it back when he passed.