The Full House FlashLight Holder by BlackJack is for mounting helmet flashlights and is designed to fit 3/4AA size lights from Pelican (2400 series), Streamlight (Propolymer 4AA, Haz-Lo 3/4AA), UK 3/4AA.
The inner dimensions of this firefighter helmet light mount is approximately 1.5"x1.1"
1. Place light into BlackJack; leaving set screw loose
2. On helmets with visors installed, place visor in "Down" position
3. Place Light lens assembly directly behind visor, (or in desired position if no visor) below brim
4. Snug up all set screws, BE CAREFUL, not to OVER TIGHTEN screws. Screws should be tight but not damaging helmet shell material.