riddle - I have more than one face, but I have no eyes. I roll out of hand during multiple tries

Riddle me this:

I have more than one face, but I have no eyes.

I roll out of hand during multiple tries.

I very much often do not roll alone;

I have a partner, who like myself, enjoys being thrown.

To you, we roll; but to us, we dance.

We are closely associated with the idea of chance.

You cannot predict what faces we will show,

Regardless of how much effort you put in your throw.

Try as you wish, but there is no guarantee.

Though perhaps you can guess exactly what I could be.

---

I made up this riddle for fun. There is a shop that I go to every week to answer their weekly riddles, and I showed this riddle to a couple of receptionists there. They said it was pretty good, however, some of my other friends found it a bit easy — the first line gave it away, thus I changed it to what it is now in the sandbox.

And so, I share this riddle with you! Hints for the answer are below.

---

Hint:

Each of my faces have a different number.

You obtain $21$ when you add them together.

Answer

Are you a

Die or a single dice?

I have more than one face, but I have no eyes.

The have six sides and when you have two you have "snake eyes" but they are not real.

I roll out of hand during multiple tries.

You roll them.

I very much often do not roll alone;

Most games have two die.

I have a partner, who like myself, enjoys being thrown.

You can have a pair.

To you, we roll; but to us, we dance.

You roll them?

We are closely associated with the idea of chance.

There is only probability associated with what you get.

You cannot predict what faces we will show,

But you will never know for sure.

Regardless of how much effort you put in your throw.

It will not really help to blow on it.

Try as you wish, but there is no guarantee.

Same as above.

Though perhaps you can guess exactly what I could be.

Your guess may be right.

Regarding the hints

Most die's have the numbers 1-6 on them and that adds up to 21.