What you got is one of the more primitive models, made from stamped, chromed steel. The second worst model.
The one awty hinted at is the best model, but even this may need leather protection on some camera models.
On the one I originally posted, there are no metal parts touching the camera - the only metal part is the hook and everything beyond that is plastic or the nylon fabric of the strap itself. So it never damaged my cameras...
It's a really great strap because you can very easily put it on and off the camera. But also because the metal rings are very thin and therefore can be fitter to any camera.
I don't think there's another system that is equally simple and quick. I got a "Peak Design" strap, but it's slightly more clunky of a process, there are metal buckles that can hit/scratch the camera, and fitting it takes longer.
What do you use? I don't think I could ever have a strap for each one of my cameras, there are too many...