they are all bics. I make flint bombs when my bic lighters die. I had one die the other day. So I threw it under the monitor to save it for flint bomb time. Well then my other ligher died right then. so i put it with the other one. Then I had a third lighter. It kept lighting like a trooper for two days even though I couldnt hear any fluid shaking in it. So I put it with the other dead bics. I went to visit a friend today, and her lighter died, so of course I took it and put it with my collection. Now I have never made a flint bomb with more than one flint before. I am going to tie four of them together, heat them up until they glow orange and throw them on the ground. If anyone has any better suggestions on how to set them off I am more than open to them.
I lit one off in the break room at work once and left permanent burn marks all over the corner of the floor,wall, and lockers.