The Diagnostic is a karambit neck knife from Bastinelli Creations. This neck knife has a Karambit style that can be used in any CQC situation. The N690C stainless steel construction makes it extremely durable and the stonewash finish will allow for long term use with little wear. A finger groove and an integrated thumb hole provide excellent blade control with this smaller size knife. The Diagnostic comes with a kydex sheath and a ball chain for comfortable everyday carry.