Make your own male 10-1 joints quickly and easily. First, establish where the back should of your joint will be and gather and thicken that area slightly. pull your tubing to a slight taper, then get the whole thing hot and blow into the male forming tool and you'll end up with a perfect taper every time. make colored joints from lined tubing in just a couple of steps. They chose brass instead of graphite for this product for longevity and consistency of the formed joint shape after multiple uses.