Gold Tip Accu-Tough Insert Stainless Kinetic 400 12 pk.. Adds strength and durability along with increased front of center. Specifications for Gold Tip Accu-Tough Insert: Manufacturer: Gold Tip Inner Diameter: 0.204 in Quantity: 12 Features of Gold Tip Accu-Tough Insert Constructed of stainless steel Spine specific fit 34 spine Package Contents: Gold Tip Accu-Tough Insert Stainless steel half-out inserts for Gold Tip Traditional Classic and Kinetic series arrow shafts. Adds strength and durability along with increased front of center.