These plastic locking stitch markers are a sturdy plastic that hook into a slot to lock into place. They're very lightweight so they won't pull on
Locking Stitch Markers for Knitting and Crochet, Plastic Safety Pins, Assorted Colors, Crochet Stitch Marker, Progress Keeper
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QincLing 385 Pieces Stitch Markers Knitting Kit, Plastic Knitting Crochet Locking Stitch Needle Clip Row Counters Markers Split Rings Holders,needle P
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Sock Stitch Markers for Knitting 5pc Crochet Stitch Marker, Progress Keeper, Project Bag Charm, Crochet Accessory, Knitting Marker
Locking Stitch Markers for Knitting and Crochet, Plastic Safety
3d Printed Stitch Markers
Sock Stitch Markers for Knitting 5pc Crochet Stitch Marker, Progress Keeper, Project Bag Charm, Crochet Accessory, Knitting Marker