2pcs 1 1/8" 28mm CNC Motorcycle Handlebar Mount Riser Clamp Machined Left Right HandleBar "Comfort and Safety This bar riser adjusts the motorcycle handlebar to an appropriate height, so you will get a comfortable driving posture. provides a more comfortable riding experience and is easier to adjust the angle" Motorbike Handlebar Risers is A safe and reliable way to fit a narrower bar to a wider stem. Simply place one shim each side of clamp area on handlebar and insert into stem, tighten as normal.