With this button you have a backup needle threader for your 3 size punch needle set. The wire is long enough for each of the refill needles. You can also use it with other punch needles of 2-4 mm thickness.
Why a backup needle threader might come handy
Al our punch needles are shipped including a needle threader . Especially wire threaders for finer punch needles are a bit fragile however. And when you’re new at learning punch needle embroidery you may break one in the learning process. Often this happens when you want to pull too thick yarn through your needle :-S. That’s when your backup threader comes in handy ;-).