Buck Diamond Pocket Sharpener. Blue anodized aluminum retractable, pen style barrel with pocket clip. Tapered diamond coated rod with groove for fish hooks. Sharpens standard and serrated edge knives. Made in China. Gold aluminum handle. Retractable, pen style barrel handle with pocket clip. Tapered diamond coated rod with groove for fish hooks. Sharpens standard and serrated edge knives. Medium 400 grit.