YOU WON’T SLIP WITH A GORILLA GRIP! The 90% tungsten Gorilla Grip dart line features Bottelsen's Gorilla Grip knurling. Unsurpassed in the industry, the Gorilla Grip knurl provides the most aggressive knurl available for greater control and higher scoring potential. 9/32" Barrel. These darts come in a deluxe case. These darts take 2BA tips. 18 Grams Flights and shafts may vary.