PENFIELD Dissector No. 4: Stainless Steel, Single Ended. Light, slightly curved. Overall length 21.6cm. Net Weight is o.76 oz. Used for Cutting and Dissecting, retraction, manipulation and dissection of nerves, vessels, and tissues during craniotomies, carotid endarterectomies and Other procedures. Used for retracting, manipulating and dissecting nerves, vessels, bone and tissues during craniotomies, carotid endarterectomies and spinal procedures. Commonly used to remove arterial plague from the walls of the carotid artery.