Keep your Exposure helmet light safely tethered to your helmet helping to prevent damage to your Joystick, Diablo or Spark light that can be caused from branches dislodging it off your helmet mount. This Exposure Light yard is designed for wrist & helmet mount usage & measures 21cm in length. Every Exposure product comes with a full 2 year warranty & continued support from the excellent Exposure Lights Service Team so you can cycle worry-free.