Cro-tatting combines needle tatting with crochet. The cro-tatting tool is a tatting needle with a crochet hook at the end. One can also cro-tat with a bullion crochet hook or a very straight crochet hook. In the nineteenth century, "crochet tatting" patterns were published which simply called for a crochet hook. One of the earliest patterns is for a crocheted afghan with tatted rings forming a raised design.
Patterns are available in English and are equally divided between yarn and thread. In its most basic form the rings are tatted with a length of plain thread between them, as in single shuttle tatting. In modern patterns, beginning in the early twentieth century, the rings are tatted and the arches or chains are crocheted. Many people consider cro-tatting more difficult than crochet or needle tatting. Some tatting instructors recommend using a tatting needle and a crochet hook to work cro-tatting patterns. Cro-tatting is most popular in Japan.