Backpack shoulder hook

Hook for backpack shoulder strap. I have narrow shoulders and sling bags tend to fall off my shoulder, especially when holding my kid's hand. This mini hook helps to keep those sling bags on my shoulder, regardless of how I move my arm. Made tiny so that it's adaptable on varying adult-sized shoulder straps. Needs to be used with a velcro/hook & loop strap of about 15mm width and 0.7mm thick. The velcro strap that I used has the “hook” on one side and “loop” on the other side. Print it on its side and don't use supports.