The Fenix ALG-03 V2.0 Headlamp Helmet Mount allows you to quickly attach and detach the HM60R, HM61R V2.0, HM65R, HM65R-T V2.0, HM70R, HM71R, or HP30R V2.0 headlamp to any outdoor or work helmet—making sure the headlamp stays securely fixed to your helmet.