The locking strip tool design allows the tip to swivel 90 degrees in either direction. There are four different type eyelets that will fit the majority of rubber locking strips. Use the tip that most closely fits the locking strip. Insert tip into the rubber gasket and thread the locking strip into the eyelet of the tool. Then work the Locking Strip Tool around the glass while feeding the locking strip into the eyelet.This tool comes with a bent shaft so that the user hand can be hel away from the molding as the tool is being used.