5-in-1 Survival tool
Besides the match safe function, they also include a whistle on one end and a compass on the cap end. Unscrewing the compass/cap accesses the matches. A ferrocerium rod is embedded in the body of the match safe, and a signalling mirror is located inside the cap beneath the compass.
The ferro rod is short and difficult to use, but not impossible. Using dryer lint, I found it worked best to wrap the tinder around the body of the tool in direct contact with the ferro rod and striking directly into it. Better still, carry a small tin with petroleum jelly-impregnated cotton balls for a synthetic tinder. Petroleum jelly soaked cotton balls are long burning and will ignite easily with sparks.
Petroleum jelly cotton ball tinder
Also, practice with the signal mirror with a friend. This is easily done by having them stand 50 or 100 yards distant, making a "V" with your Middle and Index fingers, moving the sun's reflection onto the back of your hand, and then sighting the "target" [friend] between your fingers and flashing them with the mirror.
Finally a word of caution: I have seen some cheap copies of 5-in1 tools molded in blue and green plastic for as little as a dollar. Look closely and you will find the ferrocerium rod is missing. Those knockoffs are probably okay for training youngsters, but I'd recommend purchasing a quality one for your personal trail pack, and do make sure to buy one molded in bright orange so it cannot become lost if dropped atop leaf litter in camp.