The TenPoint TRX 515 Replacement String is specifically designed for the TRX 515 crossbow, offering high-quality performance and longevity. Made from premium materials, this pre-twisted string ensures consistent accuracy and reliability. It is recommended to replace the string every two years to maintain the crossbow's optimal performance. Easy to install, this replacement string is a crucial component for keeping your TRX 515 in top condition. TenPoint TRX 515 Replacement String HCA-70320