So-called 'Exorcism Crosses' are widely available on the internet but sadly are unlikely to be any more effective than any of the other miracle crosses.
A cross used by a priest performing an exorcism rite may be cross especially reserved for that purpose (a Reliquary Cross for example). In this situation it might be referred to as an Exorcism Cross but exorcism is significantly more than just waving a cross around, whatever it may be made of or may contain.
Exorcism is treated with deep scepticism by many churches, including Catholicism, believing it is just an old superstition that has no place in modern society. Any religion that does not change with the times is doomed to become extinct. Nevertheless it remains in the Church as a rite and is used perhaps more frequently than we read about in the tabloid press.
Exorcism is mostly a series of prayers, statements and appeals, where the priest implores God to free the subject from diabolical infestation and also demands, in God's name, that the demon departs from the subject. The rite also includes sprinkling holy water on everyone present, the laying of hands, and making the sign of the cross. A cross, which has been blessed and reserved for the purpose, may be used to touch the subject.
'Exorcism Crosses' sold online and at gothic jewelry counters often contain images of St. Benedict with the accompanying inscription "Begone, Satan!" but this is in relation to telling the devil not to tempt, rather than the expulsion of evil spirits.
These trinkets are not beneficial in themselves, and they are not merely useless pieces of junk. They are potentially dangerous in that they delay your correct approach to exorcism, which is to contact a well-trained and experienced priest, ordained and authorised by the Church, and introduced to you by your local priest. Have faith in these experts. You put too much at risk by even considering any alternative.
To repeat our message at the top of this page: If you have toothache, you have a choice: shoot the tooth out with a shotgun, or visit a dentist. We strongly recommend you visit a dentist. If you believe you are being molested by an evil spirits, you have a choice: buy a so-called Exorcism Cross from the internet, or visit a priest. We strongly recommend you visit a priest. Any other attempt will not only fail but make matters worse.