"The purpose of the spacers is to eliminate any friction on the end of your throttle tube when refitting your handlebar end-weights. ???If you have a Honda and need open-ended grips you may need stepped spacers as described:??? http://www.hotgrips.com/store.php?crn=201&rn=380&action=show_detail??? If you have any brand other than Honda and require open ended grips go to:??? http://www.hotgrips.com/" . . . .