The ministration known as the last rites in the Catholic Church does not constitute a distinct sacrament in itself. It is rather a set of sacraments given to people who are perceived to be near death.
These are the sacraments of Anointing of the Sick (which, in spite of not being reserved for those near death, is sometimes mistakenly supposed to be what is meant by "the last rites", Penance and the Eucharist. If all three are administered immediately one after another, the normal order of administration is: first Penance, then Anointing, then Eucharist.
The last rites are meant to prepare the dying person's soul for death, by providing absolution for sins by penance, sacramental grace and prayers for the relief of suffering through anointing, and the final administration of the Eucharist, known as "Viaticum", which is Latin for "with you on the way."
The cabinet / box measures 23" by 13-1/4" and is approximately 4-1/2" front to back. The only article included besides the statues of Mary holding Jesus after the Crucifixion is a nice black cross with a silver Jesus attached. The cross is in bottom compartment. The compartment is a little rough inside as there is some staining on the back panel which looks like candle wax.
Overall this is a very handsome piece of religious art and might be older than stated. The back looks like it could be earlier and the front just well taken care of. Additionally. the design on top glass is reverse painted.