The Magic Mini Jacks can be used to ream open the smallest opening using on of the triangle shapes blades and moving in and out of the flame. Use the outward force of the beveled edge jack blades for opening any 2" or smaller tube or encalmo section for a nice even wall and cup shape. Other great uses for the Mini Jacks are finishing of hollow beads, pendant loops, fine tuning a mouth piece or raised carbs or even opening the constriction on a down stem. The Mini Jacks are made of hardened stainless steel which can withstand much more heat than common stainless steel. The jacks can be held directly in the flame for a few seconds without damage to the steel. Although the ideal use of the jacks, the glass is in between the tool and the flame and in many case the shaping is done just outside the flame. The dimensions of this amazing tool are 8.5" long and the blades are 0.5 mm wide at the tip going up to 0.35 mm at the widest edge. The flare dimension range is from 1 mm to 55 mm.