With this adaptor you can use burris zee rings on your ruger rifle or handgun.It properly anchors and aligns your scope so you can consistently put rounds on the target.Features a solid steel design strong and lightweight.Compatible with ruger firearms that feature the proprietary ruger integral mounting system.Type: Base AdapterModel: Ruger-to-Weaver Base AdapterStyle: WeaverFinish: MatteMaterial: SteelPieces: 2Mount Type: Ruger Integral Mount SystemRings Included: No