Material: 6061 CNC aluminum,collapsible. It is mainly used to protect the bicycle from damage in a crash, it can fold automatically, at least it can reduce the damage to the bicycle. You canFolding automatically, at least it can reduce damage to the bike. TheExpandable function can be configured according to personal preference,You can adjust the length according to your preference, whether it's long or short.Specialized in clutch lever brakes We guarantee that every product and every process is rigorously tested.Features: Expandable & FoldableFully adjustable in 6 positions.Expandable: approximately 3 centimeters.Foldable: 90 degrees.Surface: hard anodized,Easy to install, no instructions required.Package: 1 pair of brake clutch levers and 1 pair of handlebar grips (as shown)