Tattoo Machine Parts & Accessories » Spring Tension Gauge
Used to determine and adjust the rear spring tension. Spring tension goes from 0-700 grams. It is used by placing torque arm on the armature bar and pressing down on the handle of the gauge, just to the point that the armature bar touches the coil. Then read the scale for the spring tension. A must for all serious tattoo artists, takes all the guess work out of adjusting your machines. Comes with instructions.