Maxima Hunter® KV is the strongest arrow available on the market today. Made with a layer of Kevlar®, a synthetic fiber that is pound per pound five times stronger than steel. Maxima Hunter® KV offers hunters unsurpassed strength, durability and the greatest penetration within the Maxima® series. The Maxima Hunter® KV is the best hunting arrow in the market! Constructed using patented Dual Spine Weight Forward™ technology. Straightness: ± 0.0025" Weight tolerance: ± 1.0 grains Spine selection tolerance: ± 0.0025"