A surgical tool assembly includes a pair of opposing jaws pivotally connected to each other. Further, at least one viewing opening may be provided in at least one of the opposing jaws. In this regard, the at least one viewing opening may extend from an upper to a lower surface of the opposing jaw in which the viewing opening is provided. Additionally, the at least one viewing opening may include a material retainer provided proximate the lower surface of the opposing jaw in which the at least one viewing opening is provided. Further, the material retainer may include an inclined surface inclined towards a central axis of the at least one viewing opening. Further, a grasping insert may be molded onto a lower surface of the opposing jaw in which the viewing opening is provided and an elastomeric material of the grasping inserts may within the at least one viewing opening, the material of the grasping inserts covering the inclined surface of the first material retainer.