The National Precision Swing-Gate machine kit comes with everything you need except for tube, grip and needle bar. Machine kits DO NOT include instructions and should only be purchased by tattooists who are well familiar with the mechanics of a tattoo machine. The Precision Swing-Gate is precision milled our of a solid block of steel to National's own specifications (not cast). Like our other swing-gate machines it was designed for easy changing of tubes and needle bars.