Sacramentals are holy things or actions of which the Church makes use to obtain for us favors from God, through her intercession, spiritual and temporal favors.
(. . .)
The sacramentals obtain favors from God through the prayers of the Church offered for those who make use of them, and through the devotion they inspire.
(. . .)
The chief benefits obtained by the use of sacramentals are:
first, actual graces;
second, the forgiveness of venial sins;
third, the remission of temporal punishment;
fourth, health of body and material blessings;
fifth, protection from evil spirits."
Baltimore Catechism No. 3, The Text of the Official Revised Edition 1949, by Rev. Francis J. Connell, C.SS.R., S.T.D.
The chief kinds of sacramentals are:
first, blessings given by priests and bishops;
second; exorcisms against evil spirits;
third, blessed objects of devotion.
(. . .)
The blessed objects of devotion most used by Catholics are:
Holy water
Candles
Ashes
Palms
Crucifixes
Medals
Rosaries
Scapulars
Images of Our Lord
Images of the Blessed Virgin
Images of the Saints
(. . .)"
Baltimore Catechism No. 3, The Text of the Official Revised Edition 1949, by Rev. Francis J. Connell, C.SS.R., S.T.D.