Mass Bells. These Brass Altar Handbells have 4 Chimes. Size: Height 10cm 3.93 inches x Width 20cm 7.87 inches. The primary reason for the use of Sanctus,altar bells is to create a joyful noise to the Lord as a way to give thanks for the miracle taking place atop the Altar of Sacrifice. These bells are also commonly referred to as the Mass Bell, used during the Mass.