Docooler&reg; 20pcs Colorful Crochet Locking Stitch Marker Knitting Ring Maker HolderSet With smooth finish that will not hook your yarn. Every package have two size crochet stitch markers, meet your different needs. Good helpers for your stitching, help to make a marker when you are stitching, knitting or crocheting. Help to create beautiful patterns of crochet. Crochet hooks are made of high quality ABS to keep longevity.