XHT blades are made from the highest grade of steel for the best cutting and performance money can buy. With the best hardness, strength, and durability in the market, this range of blades is recommended for every mower in the market. They are stronger, harder, and last longer in any environment. XHT 3 USA Made Blades SCAG 48185 482462 482878 481711 481707 48108 Long Cut Edge. LENGTH 18" CENTER 5/8