The length of the 5mm Adjustable Punch Needle is 123mm. The internal diameter of the 5mm needle is 4.5mm, the exterior diameter is 5.5mm so it is possible to punch with wool up to 3.5mm aka chunky and super chunky yarns.
The adjustable punch needle comes with a wire threader. To change heights of your loops you simply twist the needle, slide to the punch desired slot / height and twist to click back into place.
