WDHR580  drag chain features a full round cast alloy barrel with plow face and welded steel side bars. This seamless heavy wall cast barrel is more than double the industry standard 1” full round riveted style pin. The pin keeps full contact with the entire length of the barrel giving it more bearing surface, which prevents wear. The barrel is cast alloy 8630M quenched and tempered to 350-380BHN with fully heat-treated side bars making this the preferred choice for long life and at a competitive price.