A special blend of Spectra/Dyneema and Polyester fibers grips the string to stay put. Available in 3 sizes for perfect nock fit: .018 for 14-15 strand string.021 for 12-13 strand string & .025 for 10-11 strand string.
.030 for 8 strand strings Brownell Diamondback
Let me know size on check out
Ring first to make a time