Virtually all our wedding bands are machined, or die struck, to provide more years of stronger wear. The die-striking process compresses metal to ensure maximum density and strength. Rings that are die struck are harder, polish brighter, and wear longer than rings that are cast. Plus they can usually be sized seamlessly. Cast wedding bands are more prone to porosity (tiny pockets of air). Plus they are slightly brittle and usually can't be sized without cutting the ring. The casting process is best reserved for rings that can’t be machined, such as fancy engagement rings with intricate designs or carvings.