I use a lot of vintage sewing machines and tend to be disorganized, so finding my thread snips is sometimes a hassle. Newer sewing machines sometimes have built in thread cutting.

So I designed my own. It uses a standard utility blade and two 25mm diameter and 5.5 mm thick magnets. It sticks to the sewing machine and allows you to cut the threads right on the machine. It is also designed to be near impossible to cut yourself accidently.