This steel round Diamond File has a red handle (looks like the handle has been 'dipped' so it stays in place), and measures about 140mm long x 3mm in diameter.
So handy to have in your tool kit! Poke out the obstructions from wood bead holes, ream out beads that are blocked or not large enough. Probably a bit bulky for small beads and semi-precious, freshwater pearls etc. The end of the steel file does come down into a point however, so can be used on lots of small items.