I use serger thread on my machine and the cones were too large for the spool spindle and I found that I put a regular spool of thread inside of the cone and that makes a nice thread adaptor. Works great too. Now my sister gave me 2 of the larger cones that are for long arms or some thing like commercial machines and I might be able to use those too if I put them in a cup or get a cone stand. Love my chepie thread adaptor, just a regular thread spool. Huggies, Fay