I shoot the 100gr heads and really like them. They fly well and are a tough little head. I have shot an animal yet, but hopefully soon. I would call them a cut on contact head, but technically I dont think they are. The tip is part of the ferrule not blade, but it can be sharpened on a flat stone. Mine came plenty sharp out of the package. I let someone shoot my bow and they hit the 1" steel square tube that holds up my bag and it went 2/3 thru it. I pulled it out sharpened it up replacedthe blades. I spun it on my arrow spinner and it still spins true.