Replacement service spool collar thumbscrew. This part is compatible with our SC125 and MD100 fishing line winders.NI-1001 - Thumbscrew for Service Spool CollarSKU: 1001$1.65PriceQuantityAdd to CartBuy NowAdditional Information3/4 inchDimensions (L x W x H)1.25" x "1.25" x 0.125"