The guee sol 200300300 helmet bracket has been designed and created to use a velcro strap as closure around the ventilation holes in your helmet to securely mount the bracket this is simple easy and tool free for a quick installation this guee bracket is compatible to use on a wide range of helmets so long that there are holes to fit the velcro through for fastening lastly this guee helmet bracket uses the smart r bracket system which gives you the adjustability to change the angle you