Economy diamond needle file set of ten pieces. All are 4" (100mm) long with fine grit diamond electroplated onto high-grade stainless steel. Set includes: round, half-round, flat, three-square, square, warding, slitting, oval, knife and barrette.
Find this tool at: http://www.jewelrytools.com/eurotool/jewelry-files/Precision-Diamond-Needle-File-Set-Set-of-10.html
Find more at http://www.jewelrytools.com