Do you always use your Fenix HL55 or HL60R head torch on a helmet? If so it is best if you use a permanent mounting option. You can attach this Fenix ALG-03 to your helmet with the included tape. 3M and TESA tape are both included. The 3M tape can have a slightly corrosive effect on helmets made from ABS, PS, HIPS and GPPS. That is when it is best to use the TESA tape. The main advantage of the Fenix ALG-03 is that you can click the entire clip of the head torch into it. As such you don't have to remove the head torch from its holder: you only have to remove the headband.