The electroplated diamond needle file set is used by metal workers for precise filing on stone, metal, glass and sculptures. They are also ideal for delicate filing, shaping and creating inside cuts. Files are electroplated uniformly using 150#~240# diamond grit onto high grade steel. Different 10 file shapes included in these sets offer a variety of use for different applications : Equaling, Half-round, Triangle, Square, Round, Warding, Crossing, Knife, Barrette and Slitting. Size : 4 x 160 mm.