Flashlight helmet mount. Designed for mounting a flashlight onto a firefighter's helmet, tactical helmet, etc. An M5x20mm bolt was used to attach it to the helmet. The bracket parts are secured together with an M4 bolt and nut. Compatible with the flashlight at https://www.ozon.ru/product/moshchnyy-ruchnoy-fonar-lazernyy-svetodiod-professionalnyy-zoom-akkumulyatornyy-s-magnitom-2597162949/