It is used for the purpose of preventing breaking or bending when the clutch lever or brake lever rolls but the lever is short type but there is an effect. However, since it looses often, it is necessary to tighten it, and if it falls you may need to check if it is attached
It installed in YAMAHA VINO. The end of the throttle cone of VINO is occupied and drilling work is necessary. When installing the bar end, the inner side also turns when turning the bolt, and you need a knack for tightening. I think that there should be a groove etc. so that the inside does not turn. It will be around one month after installation, but it can be used without problems without looseness.
Since the screw handle is cut in the original handlebar of ZRX 400, exchange bolts for short items, only use the end portion. It is a product that can be attached without discomfort and also looks satisfactory.