These are one-piece markers designed with a very steep slope on the face. The slope helps keep them free of debris in the cemetery. The fact that they are wider at the bottom than at the top makes them very stable and allows for a rough rock nosing along the bottom front with the face sloping away from it.
The slant helps protect the face from damage because if the rough rock surface is chipped, it goes unnoticed. The vertical back surface can be damaged, and the face size is somewhat limited with regard to lettering and design work. A base can be used under these markers.