Review on Enhance Your Sewing Experience with Hardwood Thread Spool Adapters for Star Mercerized Thread (2 pack) by Amy Mcleod

This is exactly what I need for my big hole threads (I think they were meant for the brand I bought). However, they did not fit every coil of mine. They were too small for about 1/3 of me (which is bad as they slip out and don't hold up when stringing). Also, they're expensive for what they are, which is one of the reasons they get such a low review. I ended up ordering more of these from the patchwork website and they were about 1/3 the price. Doesn't matter! I may end up wrapping them with tape to make them fit better.