Leapers airgun/.22 30mm high profile rings - UTG Pro ACCUSHOT Airgun Ring

I have three sets of these rings on air rifles. Two are springers and one is a pre-charged pneumatic. Since they are Chinese made rings, the allen head screws are metric. One of the rings comes with a stop pin that can be screwed down into the recoil stop pin hole on springer air rifles. They fit both 11 mm and 3/8" dovetails and hold securely. As these rings are anodized aluminum, they have not ring-marked any of the three scopes that I have mounted in them. I've also used the 1" version of this ring set with similar success. I've been torquing both the clamp and ring-half screws to 25 in-lbs.