Big game takedowns were made for the increased kinetic energy and extreme knockdown power of Ravin XK5 500 Grain Lighted Arrows. With an astounding straightness tolerance of .001 (inclusive of 100 grain field tip or broadhead). Product Specifications 3-Pack 500 Grain 100% Pure Carbon Construction Straightness Tolerance: .001" High-Impact Brass Threaded Inserts High-Impact Aluminum Nock Bushings 2" Offset Vanes * Not for use in Ravin R18 or R500 Series