Feature●Micron-graded diamond mineral delivers sharp, fast cutting action●Plastic handle is lightweight and ergonomically designed for operator comfort●Color coded by grade to help reduce error for multiple grades in a sequence●May be used on a variety of hard to grind substrates from non-ferrous metals to stone and glass●Great for deburring and finishingDescription 3M Flexible Diamond Hand File 6210J includes micron graded diamond mineral anchored to a rigid plastic file in a metal bond matrix with an open dot pattern. Its ideal for deburring and finishing non ferrous metals, as well as stone, glass and ceramic materials.