Olive Wood Tao Tau Finger Rosary Keyring Key Ring Chain Prayer Beads A key ring / key chain the beads of which are carved from Bethlehem Olivewood (see below for information on olive wood) with a small olive wood Tao cross on it. With this rosary, you will always be prepared when you want to pray. It will make a a great gift for yourself or a loved one. It is used primarily by Roman Catholics to assist them when saying special prayers.