I love this key hook from Taylor Stitch: https://www.taylorstitch.com/products/keyhook-in-raw-brass Kinda pricey but when I lost the first one I couldn't find anything quite able to replace it. I can put my keys inside my pocket and slide the hook over my pocket. Keeps the keys from bunching up in the bottom of the pocket and makes it easy to retrieve. Or, if I'm just going in and out quick I can hook everything on the outside of my pocket.