Say you have a throttle-by-wire H-D motorcycle and you ditch the stock hand controls for something more flashy and/or functional. It used to be an issue due to the fact that nobody made an aftermarket throttle housing that holds a grip with no cable holes. That was until Performance Machine came to town with this smooth operator. All you have to do is open it up, slide your grip into its crevice and problem solved! No Swiss cheese-looking housing on your TBW bike.