Keep your peep sight and nock point anchored securely in the bow string with BCY Nock and Peep Tying Thread. Bonded to improve abrasion resistance, this high-tenacity nylon string holds tight and does not fray when cut. Weather-resistant for long life. 0.02 dia. Spool: 75 yds. Color: Black. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Tying Thread.