You can use these to replace the plate on your POSP or to convert your AK POSP to SKS/SVD and vice-versa. Special glossy black finish is absolutely the same to classic POSP' black finish. It comes with drilled&tapped vertical holes. These separate bottom mounts come without pre-drilled "pin" holes since the holes should be drilled AFTER the bottom mount is installed and the scope is zeroed. The user is expected to pin the bottom mount when the exact mounting position is decided. Do not forget to order 4 original screws if yours are worn.