1. New polished frame
2. New tube vice insert system
3. thicker contact screw and engraving nut
8 wraps coils, used by a lot of professional tattoo artist, suitable for outlining and precision working
10 wraps coils, handmake iron frame, suitable for portrait and small colors work, quick technique better
12 wraps coils, used for shading large areas, whole back tattoo and thick lines, especially when doing black and gray tattoos