The Incudostapedial Joint Knife – 1.5mm Blade, Angled, 2" is a specialized surgical instrument used in otologic procedures, particularly for working with the incudostapedial joint in the middle ear. This joint connects the incus and stapes bones, and the knife is designed for cutting or separating these bones during surgeries such as stapedectomy, ossiculoplasty, or other middle ear reconstructive surgeries.