The MGM Deluxe Plate Rack with Bianchi Spacing is made from the best steel in the business. MGM's standard 8" round targets are 500 Brinell, which is the same hardness as armor plate. This is the same material MGM makes all their target faces of. Suitable for rifle fire, no common defense caliber or competition semi-auto is going to damage these targets.MGM offers quick change targets. To put on different shapes, all you do is pull the spring clip, slide the target to the right, and it comes off in your hand. Slide the new target in, re-install the spring clip, and get that gun loaded! One person can change the targets in well under 2 minutes, with no tools other than strong fingers or maybe a pair of pliers. Additional target sets come with the 1" hinge pin already on them. You Still don't need tools!FeaturesIncludes (6) 8" diameter 500 Brinell platesSuitable for rifle fire, common defense caliber or competition semi-auto calibers Quick change targets