Strap fastener

This is a little fastener that I designed for the straps on my backpack. They kept slipping when I was putting it on or taking it off, becoming longer and making the backpack uncomfortable.

You run the strap through the fastener and then attach it to the straps behind it.

It's designed for straps that are 26mm wide and 1.5mm thick. It'll probably work for thicker straps as long as they're no thicker than 4,5mm at any point.