The original Hammer Head No Bounce Dart line was design and patented by Walt Bottelsen. The Hammer Head mechanism virtually eliminates bounce outs. The original 90% tungsten dart line is available in 5 different styles. This dart set has the edge grip barrel in black steal finish for sure handling with no slip ups. Hammer Head has a dart for any thrower’s need. Features: 90% Tungsten barrels 2ba shafts Edge Grip Barrel with Black Steal Finish Standard Flights Anodized Aluminum Shafts Packaged in Deluxe Show Case w/ Extra Flights, Shafts and Dart Tool.