Liquid Bearings with extra long 3" needle tip, TOP QUALITY 100%-synthetic oil for sewing machines and sergers, makes them quieter and smoother, eliminates the stalling and humming when slow-stitching! Immediately begins to displace old petro-oils and lubricant sprays Completely cures slow-speed stalling and humming on your machine! Never becomes gummy like petro-oils do, wont attract dirt Thread breakage and tensioning problems vanish with proper lubrication Includes , 1-1/2. AND 3" twist-on/off needles !!