No teeth, light spring, box joint.A precision tool that will keep on weaving for millions of rings.electrically discharging handles - dissipative Max Recommended Wire Thickness (*See Notes Above): Stainless and Titanium (SS/TI): 18gCopper (CU): 14gBronze and Brass (BZ/BJR): 16gAluminum (anodized AA and bright AB): 14g Minimum Recommended Size (*See Notes Above): 22g