The Field Optics Research Kahuna Knife Grip contains a 4" dual cutting blade that can be attached to the handle to use as a knife, or attached to a removable leg of either the ProMAX or BT Precision series tripods and be used as a spear. The knife blade can be housed in either a .64"x4.0" cavity in the soft cork handle or in the shaft of the leg. The handle includes an adjustable leash to help support your wrist as you would with a ski pole.