Thread spool and bobbin holder- single

thingiverse

This is a clip designed to hold a bobbin in place on a small Mettler thread spool. I'm not certain what other brands of spools would be compatible. To detach the bobbin, simply remove it - the clip can remain attached to the spool even while installed on a sewing machine. The ridge used to snap the spool into place may be slightly undersized and can become messy during printing, but it functions adequately for my needs. Scale up or down by a few percent to achieve a snug fit.