Double strike

Double strike or double struck may refer to:


 * A double struck coin, which occurs when a coin is struck twice in the minting process.
 * Double striking, or typing a character over itself on a typewriter as a way to make it darker (or by accident).
 * Blackboard bold, whose characters are sometimes called double-struck, a typeface style imitating the chalk writing used for mathematical symbols such as $$\mathbb{N},$$ $$\mathbb{Z},$$ $$\mathbb{Q},$$ and $$\mathbb{R},$$ which can be approximated on a typewriter by double striking the letters with a horizontal offset.
 * 2023 Hollywood labor disputes, nicknamed the "Hollywood double strike" after the actors' guild declared a labor strike in July of that year, joining the writers' guilds who had gone on strike in May.
 * Double Strike, a 1989 video game developed and published in Taiwan by Sachen.
 * In bowling, strikes on two consecutive rolls.