Hough Whirly-Bird-Style KnifeDDP ELITE Hough Whirly Bird Style knife is a multi purpose tool used for inner ear procedures. The tiered design of the knife allows the surgeon to "cup" a lesion or suspected pathological tissue before incision. The knife is available in four different curvatures depending on surgical need. Please note that website images are often representative of the product family and may not conform to the exact specifications or features of the item you select.