Sorry for my English, it would much easier in Spanish, but...
I think the belt for her will be a neosteel becouse of the removable secondary shield also looks secure
My main belt is a Neosteel, too.
In my opinion for a long usage belt a removable secondary shield is important, but more for Higyene or for puntual opening than for wear it without it as usual rule.
In general I think is not advisable give us any key, since it can confuse us about relationship with belt and key holder and be a source of anxiety. I mean, key holder must be fair and generous,, and if we need a release for any good reason the key holder must give us the release, but, key holder must not be a puppet, because we will tend to have the most releases the better, and if we can manipulate our key holder the entire fact of wear a belt is a nonsense.
I think the same about safety, for that, I think thigh bands are important in some moments, they erase the hope of any stimulation, and we have more peace. Obviously, they can not be weared 24/7, but wear them when we are, for example, alone in home erase any little obsession with achieve stay alone and with get some stimulation.
In my family, even we are not forced to wear a belt, if we wear it, it is in a very safe way.
Even if you only want she wears it outside the home, I respect it, I think you should get the keys.
Another important thing is your daughter way of dress, I mean, I have a waist Neosteel and a hip Fancy, and hip belt allows wear much more clothes. I am getting used to my Fancy, and even it is a bit more uncomfortable, sometimes I prefer wear it due I can wear nicer clothes.
Long term usage has a lot of implications.
alberto We want to give her the key of the secondary shield so going to the toilet is easier for her so oral would be still posible but i think its a trade off.
Think it carefully. I mean if it is full true, it is OK, but here in the forum we have samples of key holders that at beginning said it. Mainly due they do not want afraid their girls or because they saw as go to far protect them fully. Later, when key holder see that quality belts can be weared long time and are quite comfortable, then, they decide add more security to protect their girls fully.
If you really only want avoid intercourse, as @shinydiamond77 , it is OK, go ahead, but if you think that touching herself is not a nice habit, say it openly from first moment. It is much better that add later the thigh bands or deny her the secondary shield keys when you see that she can wear the belt normally and that the belt is utilized under it's possibilities.
When we wear a belt we need trust fully on key holder, without this relationship is impossible long term usage. Here, in the forum you can see more or less strict regimes, but in all of them the key is the relationship of absolute trust.