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 Tough Koat Black finish and coarse knurl grip for sure handling with no slip ups. Hammer Head has a dart for any thrower’s need. Features: 90% Tungsten barrels 2ba shafts Coarse Knurl Barrel with Tough Koat Black Finish Standard Flights Anodized Aluminum Shafts Packaged in Deluxe Show Case w/ Extra Flights, Shafts and Dart Tool.