1" Inch 25mm Chrome/Black motorcycle Handlebar Hand Risers Universal The product is easy to install and disassemble, without drilling or welding, not easy to fall off, CNC machined aluminum alloy, anti-rust, resistance, high strength and durability." Just slide the stem extender onto the steerer tube and tighten it, very easy to fit. The handlebar height adapter is made of refined aluminum alloy, high toughness, no deformation, corrosion resistance, sturdy and durable.