Insert with undercuts

Abstract

The insert includes a base, the base including at least one depression that defines a cavity, the at least one depression including a floor with walls, the walls including a first pair of opposing walls and a second pair of opposing walls, the first pair of opposing walls each defining an undercut, the undercut including a lower inclined segment and an upper inclined segment that join at an apex, the apex of the undercut for each of the first pair of opposing walls facing each other, and a lid connected to an upper brim of the base, the lid covering the cavity.

Dependencies are inferred from the claim text.