The Fenix ALD-08 Bike Light Helmet holder is the perfect companion for a variety of Fenix Bike lights including the BC21R V2.0 and BC25R. The body of the ALD-08 has a wide design to provide security when placing your bike light on your helmet. The thick cushioning helps maintain stability while riding. You can easily use the ALD-08 Bike Light helmet holder to add an additional lighting source to your cycling setup