I have shot 4 deer so far with rage 2 blades. Three have been complete pass thrus. The only one that did not I hit the deer in the spine. The rage opened completely and I could pull it out thru the other side of the spine with my fingers and that was thru the thickest part of the spine. Anyway they have beengreat heads for me so far. Have had no problem with durability or anything. Love them.