Weaver Top Mount Rings (Medium, Matte, 0.22 Caliber, 1-inch)These scope rings are made for 0. 22 caliber rifles with factory 3 8 inch groove in the rifles receiver. These strong solid steel Weaver rings clamp directly to the receiver or Tip Off scope base and are made to fits scopes with 1 inch tube diameter. Have peace of mind mounting your optics with these Weaver rings. These rings have a solid steel construction, made for rimfire rifles.