Using these Park Tool snap ring pliers is easy. First, locate the internal snap ring you need to work on. Grip the pliers firmly by the vinyl - dipped handles. Insert the tips of the pliers into the holes or slots of the snap ring. Squeeze the handles to open or close the ring as required. When using, make sure not to apply excessive force as it may damage the pliers or the snap ring. After each use, wipe the pliers clean with a dry cloth to prevent rust. You can also apply a light coat of oil to the moving parts to keep them working smoothly. Store them in a dry place to maintain their performance.