Cottle-McKenty Elevator double-ended, 3.0 mm & 4.0 mm wide blades, 8-1/2″ (21.6 cm) Cottle-McKenty Elevator is a useful tool in a variety of plastic and oral surgeries. It can be used to dissect tissue or for elevating and scraping bone. The double-ended design features blades of different lengths depending on surgical need.