I've used these broadheads with both an older Barnett and Ravin R20. The lock collars are easy to secure in place to ensure the blades stay closed until impact. The blades simply push through the collars and don't have to open like some other heads.
The blades are extremely sharp and durable and most importantly, easy to replace. The heads are durable and I've used the same head for multiple shots, by simply replacing the blades. They fly true and accurately and nearly identical to the field tips of the same weight.
They provide a large cutting diameter and the blood trails are usually insane. I've taken 7 or 8 deer with these heads and I'm very impressed with their performance. I've recently restocked the replacement blades for the hunting seasons to come.
You won't be disappointed.