When looking at them I see no problems, if you have the power. however, I found an arrow years, a full length 2419 with a ball of deer hair on the end and most of one plastic vane missing. Under that dry ball of hair was a blood soaked wad of hair that completely covered the broadhead. The Thunderhead under it seemed sharp. There was no blood trail that I could find. Several hundred yards up the same trail I found a doe, dead for several days, with that missing part of the vane from the arrow run into the hair at the entry. Looking at wound, it was almost impossible to see the blade cuts, the doe merely had a hole punched through her.