Good price and works well enough - Pro Mag AR-15 Delta Ring Wrench PM009

I call it a "Compression Ring" since you must compress it to remove or install a front hand guard or Quad Rail on an AR.
When I was younger(I am 70yo now) I could depress the compression ring(ie "Delta Ring") that holds the front hand guard in place long enough to get the old one out and the new one in. Not now. I wanted to replace 2 Hand Guards with 2 New - 2 Piece Fiber Quad rails on 2 different guns.
I am pretty creative so I thought about making one - did not take too long to see it would be difficult. So I bought this unit.
I had read a review that said it would bend since it was not made of metal. Got it anyway. I had a brute friend of mine help me with it. He was able to compress "heck" out of the ring enough for us to install both rails. Worked just fine. No scratches or damage to the mag well or other parts. I don't think we would have been able to do it without this unit even with his strength. 4 stars because I rarely give 5 for anything until I have used it many times. I do advise it might well take 2 people to do this task. Very Do-able but not easy.