The C.U.T. 4.0 by Tops was designed by Joshua Swanagon, who is a real big fan of ring knives and their ability in combative situations. Combining his martial arts background with his love of utility blades led to this great Combat Utility Tool. This knife just feels like an extension of your hand. It has a large finger ring like a karambit but maintains a more field ready blade that is just at home on offense or defense.