A surgical instrument includes an elongate body defining a longitudinal axis, an actuation rod extending through the elongate body and a tool assembly coupled to the elongate body. The tool assembly includes a coupling member coupling the tool assembly to the elongate body and a tool portion pivotally associated with the coupling member. The tool portion includes a projection member including a blunt end portion and a cutting member extending distally outward from the projection member. The tool portion is operatively coupled to the actuation rod. Translation of the actuation rod causes pivotal movement of the tool assembly.