A diamond sharpener pen is perfect for the sharpening of Marttiini kitchen knives and filleting knives. With the diamond coated sharpener you can sharpen harder blade materials such as stainless chrome steel. This sharpener design is especially suitable for filleting knives and kitchen knives, but it is also used for for ice augers, skinning knives and gutting hooks. The sharpener also includes a sharpening groove for hooks. This small-size sharpener is easy to carry with you, and the actual sharpener is stored inside a case after use. A handy pocket clip makes sure that the sharpener stays in the pocket. Use water while sharpening, then wash and dry the sharpener after use.