Stay on Target with Aftermath Technology. These can be used with bows 45-60 lbs. These arrows weigh 8.8 grains per inch and have a Spine Deflection of.They come with 360 degree rotating nocks and aluminum inserts at no charge. This shaft size will handle up to an 60 lb bow. And they are 31.5 inches long. Easton Aftermath Straightness is +/. 005/1000 and weigh within +/-2 grains of each other. The item "Easton Aftermath 400 Carbon Arrow Shafts 2 Dz/24 shafts" is in sale since Friday, January 29, 2016. This item is in the category "Sporting Goods\Outdoor Sports\Archery\Arrows & Parts\Shafts". The seller is "blazervane" and is located in Cantonment, Florida. This item can be shipped worldwide.