The Z-Axis pin is the most critical part of the Nomi Grip set-up. By introducing a secondary axis to the traditional standard motion of the needle bar, its interaction is the key factor in the replication of the Hanebori technique. Without this pin, the Nomi Grip and Nomi Needle function no differently than your standard tattoo grip and needle set-up. This is a single use piece of equipment and must be discarded after use. These Pins are sold by the dozen, or by bags of 25 and 50.