comes with (2) cartridges, one installed, other in handle for storage, goes where other tools and sand paper can't reach, use it like a pencil eraser, but it reacts like a sand blaster, ,
comes with (2) cartridges, one installed, other in handle for storage, goes where other tools and sand paper can't reach, use it like a pencil eraser, but it reacts like a sand blaster, ,