It''s metal as fuck, bro. Stay HARD as steel with our Pinch Zero Ring. The weighted hug of a metal ring...with ZERO pinch. Our extra-wide Magno opening makes for the EASIEST on and off. Weighing in at half a pound, once you start headbanging, you''ll KNOW it''s there.Features ZERO Pinch Magno Lock Xtra Wide Opening Body-Safe Silicone Sheath Approximate Product Dimensions: Unstretched Inner Diameter: 1.77 in. (45 mm) Depth: 0.7 in. (17 mm)