HIGH QUALITY & DURABLE MATERIAL – The red inner layer is anti-skid nylon, keeping the Nocks from sliding, While the rolled edged outer layer, protects the bowstring from damaging or wearing. EASY TO USE – Easy to install and remove by just using a plier & Archery T-Square, to crimp it together so they stay firmly in place. FUNCTION – Using a Bow string nock will help bracket and guide the arrow in the right direction for consistent flight, while increasing the accuracy of your shot. In addition, it Can stabilize the site for the bow. LIGHTWEIGHT – Each Archery Nock is only 0.2 x 0.2 x 0.12 inch / .5 x 0.5 x 0.3 cm, making it easy to carry and store. RISK FREE PURCHASE – If you’re not 100% satisfied with your purchase, you will be fully refunded, as at Keshes, we back our products 100% and Guarantee your full satisfaction.