It provides excellent surface finish and easy access to difficult areas.Our hand-held conical diamond files are precisely manufactured with the highest quality diamond and give polishers easy access in difficult areas, such as rods and grooves. They also provide an excellent surface finishDiamond cone files CF-400Shape: Inclined planeThickness: 0.3 ~ 1.5mmWidth: 2mm, 4mm, 6mm, 8mm (6 pieces of each width)Grain size: 150 , 200 , 400 (8pieces of each grain size)Length: 180mmEffective bits: 50mmcolour:silverMaterial:DiamondPackage Contents:24 x mechanical fileOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.