The Ultra Knife Sharpener is the complete solution for all your BUBBA sharpening needs. No matter the condition or skill set, easily and effortlessly sharpen any knife! The locking system adjusts from 19 to 26 degrees on either a medium 400 grit stone to a fine 180 grit. The Ultra Knife Sharpener bridges the gap between a novice knife sharpener to an experienced commercial sharpener with no effort.