"I shall draw them to me by chains of love" Hs. 11:4
St. Louis de Montfort strongly recommended, after his own example and that of many other saints, that those who complete the 33-day Total Consecration to Jesus through Mary and make the Act of Total Consecration should wear an outward sign as a reminder and expression of their "holy slavery" to Our Lady in the form of a chain.
St. Louis de Montfort wrote, “It is very praiseworthy and helpful for those who have become slaves of Jesus in Mary to wear, in token of their slavery of love, a little chain blessed with a special blessing … I cannot help but give the warmest approval to those who wear them. They show they have shaken off the shameful chains of the slavery of the devil, in which original sin and perhaps actual sin had bound them and have willingly taken upon themselves the glorious slavery of Jesus Christ. Like St. Paul, they glory in the chains they wear for Christ.”