Hey people,

I am curious to know what the name of the instrument(s) that measures a boxer's punching power, or the PSI (Pound-Force per Square Inch)?

I am looking into opening my own boxing gym and want to buy one of these.

So does anyone know the name of the instrument and where I can buy one?

If you don't know what I'm talking about, check out Rocky IV. Ivan Drago uses one in this movie. I know pro boxers use them too.

Thanks.