This listing is for TWELVE SETS of Scope Rings. Here is Weaver's traditional economy scope rings for grooved receiver .22 Rifles like the Marlin 60, and air rifles. Manufacturer is Jiaozuo Sanlida of Henan, People’s Republic of China, Tasco’s primary contractor. Importer, warrantor, and distributor is Onalaska Products. Construction is alloy uppers and lower halves, with steel screws and steel plate. Vertical screws are hex head, and wrench is included. These rings are designed to mount 1 inch tubed scopes and light devices onto rifles that have 5/8 inch dovetailed grooves in their receivers, or that are furnished with a correct 5/8 wide base adapter, like the Ruger 10/22 rifles come with. Each set comes in its factory package with instructions and warnings against overtightening. Replacement pricing is $17 per set on weaveroptics com. We're offering them in wholesale lots of 12 sets, at only $3.59 per set, however. Own a dozen sets freight paid lower 48 for only $ 43.00. Quantity buyers, 10 dozen gets one dozen free!