Much like the U.S. Tomahawk missile, long range, accuracy and impact is our .165 arrow. 9 layers of high carbon modulus creates durability, fast speed, less wind impact and packs a punch for any big game with a massive 125 grain stainless steel half out for maximum penetration! 0.300 / 10.6 GPI / +/-.003-.001 straightness / .165 ID/ .248 OD 0.350 / 9.8 GPI +/-.003-.001 straightness / .165 ID / .242 OD 0.400 / 9.0 GPI / +/-.003-.001 straightness / .165 ID/ .238 OD Remember, Flexem before you shootem!