The rings came with the Tasco scope I bought for my Ruger 10-22 rifle. They are well built. The tops are held down with good hex-driver screws and the rings are tightened to the rail by finger with knurled screws and fully tightened with a slot-head screw driver. Recommend getting a good set of gunsmith screw drivers for this and all work on your guns.
Pros: Solidly built and easy to install.
Cons: None.
This review was written in the old system and had content requirements that are different than reviews written today.