You will receive two dice, one spindown counter 40-21 and one spindown counter 20-1.

These dice are a must for playing games where you start with a high life total such as the Commander or EDH variation of Magic: The Gathering. 

With everything that is going on in these MTG games make your life easier with these dice and at least keeping track of your life total won't be a hassle. 

These dice are spindown dice so the numbers are in order and you can simply spin the dice to go from 40 to 21 and 20 to 1. 

These dice are 22mm d20s so they are the same size as the standard spindown die.