This is a single ten sided spindown
die. Two of these dice together can be used to keep track of life totals from 0 to 99 in games such as Magic: the Gathering.
The metal version of this d10 measures about 27 mm (1.1 inch) from point to point, and about 14 mm (0.6 inch) across opposing sides. Printed in steel it weighs about 4 grams. The die is designed to be well balanced and to give a fair roll.
This version of this design has the numbers oredered in a spindown pattern, with consecutive numbers placed next to each other. This makes it easier to find the right number when using this die as a life counter in games such as Magic: the Gathering. A version with regular numbering, for use in tabletop roleplaying games, is also available
The design of this die is meant to fit with the visual style of the latest expansion set for Magic: the Gathering, called Kaladesh. See here
for all my Kaladesh themed dice.