DESIGN: This ready-to-play dartboard set includes the Viper Dead-On Dartboard and the Viper Guardian Dartboard Surround, black 17.75" professional-quality steel tip dart board made with self-healing sisal fibers to ensure a long life The scoring segments are separated by a triangular steel spider-wire and the inner bullseye is staple-free to help you hit your target, reducing bounce-outs and deflections The Viper Guardian easily mounts onto your Dead-On Dartboard without any extra hardware, keeping your wall free of extra holes Simply mount it on your dartboard and you're ready to go Includes two sets of starter darts, a throw line, and a measuring tape to make sure everything is setup properly