I think you have inadvertently confused an “R” with a “K”. The OK (sometimes called the “Circle K” is one of the most highly respected commercial hashgachos headed by Rav Donald Levy, Shlita. While perhaps not at the gold standard level of some smaller Chasideshe hashgachos, it is still more than adequate for the needs of the poishete yid who want to adhere to the laws of kashruth.