What it is: 120 m spool of 400D nylon bowstring serving thread (400D/3 construction), approx. 1 mm thick, with a breaking strength of 34 lbs. Why you need it: designed to reinforce bowstrings and to securely attach accessories such as peepers and nocks. The density 400D/3 construction resists fraying and wear, so your serving holds tight under repeated use and tension. Key benefits: Reliable strength: 34 lb breaking strength provides consistent performance for smallscale loadbearing applications. Durable construction: density 400D/3 nylon resists abrasion and repeated wrapping, extending the life of your serving and repairs. Consistent fit: smooth texture and uniform 1 mm diameter make wrapping and knotting easy, producing tight fits without slippage. Ready to use: 120 m spool gives ample length for multiple jobs and ongoing maintenance. Function and compatibility: Specifically suited for bowstring serving and accessory attachment (peepers, nocks). Works with other smalldiameter cordage needs where a thin, strong, and abrasionresistant thread is required. Practical use scenarios: 1. Reinforce and reserve a recurve or longbow string, creating a neat, durable serving that keeps peepers and nocks firmly in place. 2. or kite bridles and flying lines that need a thin, strong cord resistant to abrasion. 3. Use in shoemaking and leatherwork for corded trims, eyelet reinforcement, or any small craft requiring strong, thin cordage that holds under tension. Technical summary: Material: 400D nylon (400D/3) Length: 120 m per spool Diameter: approx. 1 mm Breaking strength: 34 lbs Characteristics: abrasionresistant, lowfray, smooth texture, consistent diameter Use this serving thread when you need a dependable, thin cord that holds tight, resists wear, and makes wrapping and securing fast and reliable.