Pack of most commonly used 5 Diamond Needle Files: FLAT, ROUND, HALF-ROUND, TRIANGULAR & SQUARE. This set covers most art and craft and finishing jobs for Metal, Glass, Stone, Jewelry, Mold Making, For Die-Makers, Nails, etc. It is also suitable for enlarging holes, removing excess solder, fitting a clock and watch glasses, shaping precious stones for jewelry, sharpening household objects, etc.