A flamer may be used to sterilize poultry litter, soil, concrete, etc. A pair of generally congruent indentations are formed into the right side and a pair of offset indentations are formed into the top of the holder. The cam is within the opening of the housing and includes a passageway through which a shaft of the housing extends. By changing the orientation of the projection, the storage slot accepts cartridges in a different orientation as the proper orientation.