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 gives dart players the most aggressive knurl available for greater control and higher scoring potential. 2BA Barrel. These darts come in a deluxe case. Flights and shafts may vary.