Hand knitting and crochet designer, author and lecturer Ruth Herring demonstrates how to work Crochet edgings. In part 1, learn how to work Crab stitch crochet. Crab stitch is a useful stitch to master as it can be used for producing a professional finish for both crochet and hand knitting projects. The stitch is essentially working Double Crochet (US Single Crochet) stitches in a backwards direction along the last row. The resulting edge has a lovely braided look.