Make rebuilding your coils fun and hassle free with the Coil Jig V3 from UD. This light weight, easy to use tool is great for DIY vapers. It comes with 6 different diameter of heads (1.5 / 2.0 / 2.5 / 3.0 / 3.5 / 4.0 mm). Building that perfect micro coil takes seconds with this tool.