BlackHeart crossbow strings are handcrafted using the right blend of modern materials, machinery and time-honored techniques. Result: crossbow strings featuring our innovative GlideLock servings and exclusive DuraWeave construction that makes for the absolute finest system available today. Each string is meticulously crafted to fit your crossbow. Fits: Barnett Blackspur TT, Barnett Lady Whitetail Hunter, Barnett Raptor, Barnett Raptor FX, Barnett Raptor FX3, Barnett Raptor FX3 Pro, Barnett Recruit Compound, Barnett Recruit Tactical, Barnett Recruit Terrain, Barnett Recruit Youth 100, Barnett Recruit Youth 30, Barnett Recruit Youth 60, Barnett TS380, Barnett Whitetail Hunter II