A foldable box opener is securable to a writing or pointing implement and has a blade mount having a collar attachable to a top portion of the writing implement and a portion adjacent the collar, with the offset portion including an opening extending through the offset portion, a blade including a first blade edge and a second blade edge opposite the first blade edge, and a pin attached to the blade and the collar allowing rotation of the blade about the collar. The blade first edge is tapered to have a smaller thickness than the second edge, with the first edge thickness being sufficiently narrow to cut a cardboard box or packaging tape while being sufficiently wide to prevent a user's skin from being pierced or lacerated.