The Multi-Functional Knife Sharpener is an easy-to-use, compact sharpener for the tool or tackle box, as well as in the field. There are 3 positions on the unit made to quickly set and hone your blade edge; one large, one narrow, & one flat position. The tapered round diamond coated rods are ideal for sharpening serrated and standard edges. The pre-set carbide rods are positioned to quickly set your edge. Great for sharpening knives, scissors, blades and more! WARNING: This product can expose you to chemicals including bisphenol_a_(bpa), which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to: www.P65Warnings.ca.gov