The CaldwellA(R) Magnum Rifle Gong is a high quality, extremely durable steel gong designed to withstand repeated shots from all calibers of high-powered rifles and handguns. For those shooters who are not in need of the entire Magnum Rifle Gong systems, CaldwellA(R) is now offering just the steel gong plate. The gong is 10 in. diameter and is three-eighths of an inch thick. Constructed of industry leading AR550 steel tested to a Brinell hardness of 550, the Magnum Rifle Gong can take a hit and keep on swinging. The Magnum Rifle Gong is designed to be shot at a minimum distance of 100 yards.