I know that, so if a Hindu have them prayer beads (also used in Buddhism, Catholicism, Islam, Sikhism and the Bahá'í Faith to mark the repetitions of prayers, chants or devotions) should they give them to members of that faith or others?
Or do you really think they are Scriptural? Or that they must be?
The rosary is certainly not Scriptural except for the Our Father which was given by Jesus Christ in Scripture and the first half of the Hail Mary which were the Scriptural words of the Archangel Gabriel to the Virgin Mary at the Annunciation. All that which pertains to Christianity need not be contained in Scripture, a major difference between Catholicism and Reformed Christianity.