I had heard also about the rods coming of the mag bar.
It is very time consuming to shave off enough magnesium to be of use in fire starting. Mag. lights easily and burns fast when you only have a small pile of it the size of a dime. I dissapears quickly. 1 tablespoon full will start a fire in the rainiest, wetest conditions if you know how.
These photos show 1 tbls of magnesium sealded in a plastic pouch and flattened to fit in my wallet. Flattened out it is the size of a credit card. Shown also are rocket ignitors used with a nine volt battery as the source of electricity to make them work. The wires sticking out from under the packet of magnesium are the ingnitor wires. This is just another means of starting your life saving fire. If you carry it with always and know how to use it, your chances of survival in an emergency situation have improved greatly.
I'm just like PureMehem, I don't leave home with out my wallet and my keys. On my key ring is the flint, in my wallet is the steel(razor blade) and magnesium shavings ready to go. Any time I go to a government buiding I leave my wallet in the car.
Notice the little DIY l.e.d flashlite on top of the 9v battery.