Its incredibly durable, my friend. Stay as tough as steel with our Pinch Zero Ring. Experience the comforting weight of a metal ring with ZERO pinch. Our extra-wide Magno opening allows for the EASIEST on and off. Weighing half a pound, once you start headbanging, youll definitely feel it. - Depth 0.7 in. (17 mm) - Ring Inner Diameter 1.77 in. (45 mm) - Material Silicone/Iron