They are easy to sharpen as others mentioned.  they have Good penetration.

Excellent heads i am not sure why they dont get more attention.  Very high quality and as mentioned they fly so well they are not much good for broadhead tuning.

I shot this bull elk about 10 years ago when I first started shooting STOS broadheads.   As you can see in the photo the hit was right in the shoulder.  The elk was broadside when I shot.   My shot was to the right of where I was aiming.   The arrow was about 600 grains and the bow was a 52# Black Widow recurve.   The arrow penetrated up to the crest and the bull went about 60 yards.  it made a believer out of me.       m

That's a very nice bull.  Great test for the broadhead.

nice elk...did the job well

Perfect shoot,Jim