B-Square 30MM High Standard Dovetail Sports Utility Rings. The B Square sports utility rings have a wrap around design and are manufactured from aircraft aluminum. They have a maximum scope retention and twice the clamping area with an exceptional clamping strength. Available in 1-inch and 30mm diameters Standard ''Weaver'' dovetail and .22/Airgun dovetail are available. Fits any scope size: low medium or high. Hex-key included. Satin matte black or stainless finish. UPC: 54082200667