This is a very simple clip-on type hook, sized for 1" webbing straps.  I made it to let me use some cheap lashing straps for light-duty tiedown work in the back of my hatchback without having to un-loop them and wrap them around the object every time, and they work quite nicely for that.  

I printed these in Overture black PETG with four perimeters and five top / bottom layers, they seem to be amply strong enough for my use.