Souarts Knitting Crochet Stitch Marker Row Counter Hand Crafts Tools Pack of 4pcs Material:Plastic; Color: Blue; Package: 4 Crochet hooks included Size: Approx 50mm * 13mm; Hole size: 9mm; Thickness: 13mm Allows you to track row, stitch and pattern counts - Helps you through any project. Slips onto needle, so you can track number of sts. and rows already worked. Alsoyou can DIY it to become essentially a necklace pendant and then U can crochet away to heart's content.