The Black Eagle SPT Nocks are engineered for serious hunters seeking precision and reliability. Designed to fit Spartan arrows without the need for a bushing, these high-performance nocks are made from impact-resistant polycarbonate and deliver tight tolerances for consistent arrow flight. Each weighs just 8 grains and is available in multiple color options, offering both function and visibility. Whether you&';re in the field or on the range, these nocks provide the performance you need shot after shot.