Circular needles are a type of knitting needle that consists of two pointed ends connected by a flexible cable. They are designed to allow knitters to create projects in the round, such as sweaters or hats, without the seams that straight needles would require. The cable comes in various lengths, making them suitable for both small and large projects. These needles are popular among knitters because they can hold a large number of stitches comfortably. Additionally, the flexible cable helps distribute the weight of the yarn, reducing strain on the hands and wrists. Circular needles can also be used for flat knitting by simply turning the work at the end of each row.