Help identify broadhead brand

[Oregonbowhiker]

Hoping someone can help tell me what brand these are. I got them awhile back with a used bow. They fly great just like a field point but not sure how durable they are if used on elk.

 

[Rich Z]

looks like a Kolpin Twister

 

[Oregonbowhiker]

They fly amazing but not sure if they are as good as the shuttle t if you consider durability and flight?