Don’t be just another dart monkey - rule the pub jungle with the Hammer Head Gorilla Grip 90% Tungsten Steel Tip Darts . Choose your dart weight and barrel thicknesses, and use Hammer Head tips to Donkey Kong the competition. The patented Hammer Head mechanism uses a unique point, clip, and barrel design that allows the tip to retract into the dart slightly on contact. The point slips off the obstructing wire, and then the forward thrust of the dart hammers the point into the target. And, with that, you"ve virtually eliminated bounce-outs from your game. Each dart is constructed with a Tungsten barrel, nylon shaft, and O-rings for secure locking of all points. About Bottelsen Bottelsen Dart Company is an American manufacturer of championship steel- and soft-tip darts. Home of the famous Hammer Head No Bounce Dart, Bottelsen has set the standard for professional darts for over 30 years. All of their darts are made in the USA. Bottelsen is located in Santa Maria, Calif. * 90% tungsten barrels with aluminum shafts * Choose from 1/4 in., 17/64 in., 5/16 in., 9/32 in. barrels * Choose from 23, 25, 27, 31, or 25 grams * O-rings ensure securely locked points * No-bounce steel-tip Hammer Head points