Henrys is a skill toy and yo-yo manufacturer that is based in Karlsruhe, Germany. It was started in 1984. They are best known for their juggling equipment, from diabolos to juggling clubs. In their Karlsruhe shop, they used to sell yo-yos produced by Tom Kuhn, Yomega, and Hummingbird. In the late-1990s, Henrys started making their own yo-yos, starting with the Viper, a yo-yo designed to be visible in stage performances (hence the larger diameter) and meant to look a little like their diabolos. These days, their shop carries only their own brand of yo-yos, and not yo-yos from other brands like they had used to.