The Lansky 4-rod Ceramic Turn Box Sharpener is a very stable and compact knife sharpening system, perfect for use in the kitchen. The two-stage system includes four 5-inch alumina ceramic rods--two of medium grit and two of fine grit--to suit different types of blades. The system features a hardwood turn box wood block base that also stores the rods when they are not in use. The wood block offers two preset knife angles of 20 and 25 degrees that lend themselves well to maintaining kitchen knives and the ultra-sharp edges required of filet knives. With regular use, the turn box system is simple to use--it only takes a few swipes to maintain an edge and keep your knives in good working order. This compact system is easy to store in a drawer and is light enough to use outdoors.