Foredom Diamond Hone Plastic Handle, 250 Grit, Super Fine, Blue
Shape anything from glass, metal, stone, bone and plastic, and for sharpening steel instruments.
Sharpen or reshape abrasive points by lightly rotating the point against the diamond surface.
Size: 150 x 19 x 4mm. (6” L)
Sanding area: 51 x 19mm (3/4” wide x 2”)
Also available in other grits here - 400, 600, 1200.