The EZ Aim Hardrock AR500 Target is made of 1/2-inch thick armorplate steel to withstand the impact from high power hunting rifles. The white powdercoat finish shows bullet impacts. EZ Aim Hardrock gongs have three connection points: two at the edge for attaching chains or straps and one in the center for gong hook attachment: Dimensions 12-inch diameter and 3/8-inch thickness.