The Turn Box family is a very stable and compact knife sharpening system. It works well in the kitchen and it quickly breaks down for storage in a drawer. The turn box family of knife sharpeners is also great for outdoorsmen on the go because it is lightweight and stores easily into a backpack. It only takes a few swipes to maintain an edge (a bit more if you have a really dull knife). There are two pre-set knife sharpening angles in the wood block 20 degree & 25 degree. 25 Degrees - This is used for most kitchen knives and provides a sharp, durable edge. 20 Degrees - This is used for those desiring a very sharp edge. Some examples would be for filet knives or cutting tomatoes. Lower degrees result in sharper knives, but require more regular maintenance. This 2-Stage Knife Sharpening System features a hardwood turnbox with internal rod storage in the base. Includes four 5" long alumina ceramic rods. (2 medium grit, 2 fine grit).