325 Coarse Grit, flat with hook sharpening grooves. & 750 Medium Flat side. The EdgeTek Fishing FlipStik offers an easy carry sharpener with a 100% diamond coated surface and oval contour for sharpening a wide variety of blade edges. It is lightweight and compact, with a handle that also doubles as a carrying case. For those on-the-go, who may need a touch up a knife or fish hook after lots of field work, don"t be caught without a FlipStik.