Reaching the needle packing screw can be tricky without the proper tools. This clip shows you how to change and adjust your airbrush’s needle packing using the screw drivers included with the Iwata Professional Maintenance Tools Set. These screw drivers are designed to let you “feel” the tightness of the packing screw. You’ll want it tight enough to prevent backflow of paint but loose enough to allow the needle to move back and forth comfortably. Click the link below to see everything included i