The E5 Upgrade Kit adds versatility to the E5 Kitchen Knife Sharpener with 15° and 20° sharpening guides, and specialty sharpening belts optimized to create traditional East and West edge profiles. The E5 Upgrade Kit includes one Coarse blue belt, two medium red belts, one fine grit grey belt, and one extra-fine white belt. Each set of sharpening guides (East and West) uses a "recipe" with specific belts and sharpening cycles to create the desired edge profile.