Keep a d20 handy wherever you go! A twenty-sided die (d20) is held in black rubber rings and anodized aluminum rings in your choice of colors. To remove the d20 first unclip the lobster clasp and then carefully stretch the rubber rings to push the die out. Reverse the process to reassemble the keychain. It is suspended from an 18" flexible cord. A twenty-sided die (d20) is encased in anodized aluminum rings in your choice of colors. Select from 18 different ring colors and 9 different dice colors.