4 Pcs Spool Pin Cap Set for smooth thread unwinding and reliable feed 4 Pcs Spool Pin Cap Set: replacement spool pin cap components designed for smooth thread unwinding during sewing operations. Compatible with models including 3223, 3232, 4423, 4432, 5511, 5523, 6510, 7312, 8280, and 9100 Auxiliary Replacement Spool Cap: long lasting plastic construction ensures stable performance on various sewing machines such as 2010 Professional, 2250, 2277, Tradition, 3321, 3342, Fashion, Mate and 3825 Spool Pin Functionality: secures thread spools effectively to avoid tangling and ensure consistent feed. Compatible with 1116, 1525, 1748, 2009, 2263, 2932, 3116, Simple, 3709 and 3810 Easy To Install: standard size white spool pin cap set includes 1 x spool cover, 1 x spool cap, 1 x spool, and 1 x spool rod for quick setup on compatible devices such as 4452, 5532, Heavy Duty, 6550, 7350 and 8770 Use scenarios Replacing worn or missing spool pin caps on compatible machines to restore smooth thread unwinding and reduce tangling during sewing projects Standardizing spool handling across multiple machines in a home studio or workshop to ensure consistent thread feed and reduce jams when changing spools Quick or maintenance during ongoing projects, enabling fast installation and minimal downtime with a complete, readytouse spool pin cap set