... ,Bicycle Bar Mount HD25 2,Bar Size:28 to 32mm 3,Hole Diameter for the Flashlight:25mm 4,Weight:65g 5,Used ... screw by tooling and inset the light through the small hole ( if mount the flashlight , you must turn down the tailcap ... bar mount: Loose the nut screw down of another bigger hole side , it can be easy to mount on the bar ...