Lansky’s 4 Rod Ceramic Turn Box knife sharpener LCD5D is a very stable and compact knife sharpening system. This item works well in the kitchen and breaks down easily for easy storage. There are 2 pre-set knife sharpening angles in the wood block, 20 degree and 25 degree. The 25 degree is used mostly for kitchen knives and provides a sharp, durable edge. The 20 degree is for those desiring a very sharp edge. An example would be for fillet knives. Lower degrees result in sharper knives, but require more regular maintenance.