Oliveti Tungsten Carbide Men's Brushed Center Ring (8 mm) This ring CANNOT be resized Features: Highly scratch-resistant, tungsten is four times harder than titanium Impact: While extremely hard, tungsten may crack if struck at high impact Styling: Flat top, two grooves, high polish, textured center Comfort-fit band: Comfort-fit bands are contoured on the inner surface for a more comfortable fit