I personnaly would never use a metal type loop on my bow -- way to many negatives, I will briefly list some things I have seen:

- I have seen them come loose and cause either damage or injury.
- They add a lot od weight to the bow.
- They have been know to damage releases.
- They travel forward significantly on the shot, I have seen them hit and damage rests on short brace bows.
- They DO damage your string and serving where they are clamped on.
- I have seen them rip into a guys arm and cause a nice big cut.

I have been using tied on loops for years and never had a proble -- if you lack confidence in a ties on one, there are a couple of types that are installed differently that cannot come off.

Just my Opinion!