I actually use 2 of these straps to attach to the daisy chains (one on each) to each side of the main zipper on a Scree 32. They are completely adjustable, extremely light and have carried an extra 12 L stuff sack, spare layers, etc. that sit horizontally - just adjust to length and buckle. A thought is to have a bag/sack for your tools, and then just buckle/cinch it in.