Take the guess work out of coil wrapping! The Tobeco Coil Building Jig makes sure you make the exact coils you want, every single time. 5 included rods - 3/64, 1/16, 3/32, 1/8, and 9/64 - means never looking for a screwdriver with "about" the right shaft size! This clever coil building jig even includes internal storage for the rods, as well as a 510-threaded hole for keeping your favorite atomizer upright while building. Make clean, consistent coils every time with the Tobeco Coil Building Jig!