Tattoo Spring Adjustment Tool allow you to get your machine as straight as an arrow. Slide your Armature Bar into the rails. Place your screw and washers. Place your springs into place. Back Spring on bottom and Front Spring on top. Tighten down your allen screw and your all good to go.
Please note: This tool does not allow you to bend your spring. You will need to get the Metal Version for $25 if you wanted to bend your spring.