The Falknersheil is a highly specialized knife. The uniqueness from all of the other knives comes from the notch in the blade. This notch is used for killing prey once captured by the raptor. The unique notch is designed to severe the carotid artery or wind pipe as the blade is inserted into the preys neck .
The sheath is very distinctive also. It has an leather tether with a ring and shackle. This is used to attach one end to the birds jesses ( leather pieces tied to the birds ankles ) and the other end to the sheath. This is to control the flight of the bird once a prey has been taken and recovered on the ground by the hunter.
Similar to the leash on a dog, the tether attached to the jesses is to keep the bird from going after small game when the Falconer does not want it too.
The knife being specialized to Falconry was produced in very low numbers accounting for it rarity.