20 PIECES OF DIAMOND FILES IN DIFFERENT SHAPES: This set contains 20 pieces of diamond files in different shapes. Including knife files, round files, square files, equilateral triangular files, leaf files, triangular files, oval files, semicircle files, flat files, knife files, sharp flat files, etc. HIGH STRENGTH, DURABLE AND UNBREAKABLE: The sharpened diamond file is made of high quality metal steel and the handle is covered with rubber. The contoured file is made of alloy and has a rubber-coated handle. The metal particle surface effectively improves the cutting efficiency and wear resistance of the file. SOFT, NON-SLIP RUBBER HANDLE: The handle of the diamond needle file is wrapped with rubber. The non-slip soft rubber handle is ergonomically designed. It provides excellent grip and effectively reduces pressure on your hands during use. Can be used for a long time.