Keep track of your hit points! Or anything else really that can be measured in whole digits not to exceed 999. This HP drum is robust and small enough to fit on your key chain. Dimensions for the Drum HP counter are 47mm long and has a diameter of 28mm. Each counting ring is 10 sided measuring from 0-9. Allowing this drum to keep track of hit points from 000-999. Each number ring has a slight amount of friction to keep your input accurate. These HP drums are 3D printed in two separate colors. Make sure to choose your “outside” and “inside” colors at checkout. More colors available upon request