Check the listing for details. Plastic Archery Arrow Nocks .244"/6.2mm(Red, Pack of 50). Condition: New. Listed at 15.84 USD. What is this?Archery nocks play a vital role in securely attaching the bowstring and facilitating the flight of the arrow.What will I get?The Archery Arrow Nocks, our provides here, are in the size of 31x7 mm/1.2x0.244 Inch(LxD); Material: Plastic; Color: Red; Packing List: 50 Pack x Archery Arrow NocksIs there any advantages of the product?With a press-in design, the arrow tail is easy to install and suitable for DIY, which enhances the performance and stability of the arrow, bringing the shooter a satisfying shooting experience, confidence, and fun.How to use it?1. Gently insert the Plastic Carbon Arrow Inserts into the end of the shaft with your fingers to ensure proper depth of insertion.2. Gently pull on the Arrow Nocks to test for stability and to ensure a secure connection.