I have selection getting size right paramount. I like the split ring with an allen key, some samples on my page from cock ring - wedding rings - ball stretchers can also mix and match according to mood. Surgical Steel best as wont rust and the weight canbe awsome. Improved my libido greatly and they come in various weights too heaviest is 430gms and lightest 30gms put all on and you are over 1kg. With metal can also have them hot or cold when they are fitted.