If you plan on center serving your own bow string, you need the Serve-Tite String Server from Bohning. This tool has adjustable tension and smooth thread flow allowing you to get consistent tension on your string servings. The larger top feeder groove makes it even easier to get accurate and consistent servings each and every time. Made from a high impact polymer, this tool will last, and is an essential for any pro shop or archer who wants to work on his own equipment. Tool only, serving not included.