The Needle Depth Gauge is a small little metal piece that can fix huge problems. This is one of those pieces to have in your toolbox. At only $23.50, it's economical as well.
I hear you ask, 'But why do I need a needle depth gauge"?
During the course of running an embroidery machine you could have a large birds nest or hit a hoop and that can could cause your needle bar to slip. The needle depth gauge can help you be assured that the needle depth is correct on your machine.
Symptoms of having your needle depth off includes needles breaking, thread breaking, and thread fraying.
This gauge is universal and works with nearly every brand of machine on the market that takes an L size bobbin case or L size bobbins. Old machines and new, this little piece of metal can save you thousands in tech repairs.