Wrap the flexible spring around existing collar button and collar to increase size by up to 1/2". Expander stays hidden as it loosens tight collars. They are reusable, rustproof and slip on

Specifications

✔ Free shipping on orders over $99
✔ Ships from our USA (Georgia) office when in stock
✔ Weekly restocking from Japan, China, Bangladesh, and Turkey warehouses
✔ 3–7 business days handling time
✔ Compatible with multiple industrial sewing machines
✔ Carefully inspected before shipment

💡 Add more items to your cart to qualify for free shipping ($99+)

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⚠️ Please confirm your machine model before ordering