Whether priests alone have the keys?

Objections

Objection 1 : It would seem that not only priests have the keys. For Isidore says (Etym. vii, 12) that the "doorkeepers have to tell the good from the bad, so as to admit the good and keep out the bad." Now this is the definition of the keys, as appears from what has been said (Question [17], Article [2]). Therefore not only priests but even doorkeepers have the keys.
Objection 2 : Further, the keys are conferred on priests when by being anointed they receive power from God. But kings of Christian peoples also receive power from God and are consecrated by being anointed. Therefore not only priests have the keys.
Objection 3 : Further, the priesthood is an order belonging to an individual person. But sometimes a number of people together seem to have the key, because certain Chapters can pass a sentence of excommunication, which pertains to the power of the keys. Therefore not only priests have the key.
Objection 4 : Further, a woman is not capable of receiving the priesthood, since she is not competent to teach, according to the Apostle (1 Cor. 14:34). But some women (abbesses, for instance, who exercise a spiritual power over their subjects), seem to have the keys. Therefore not only priests have the keys.