Weaver's grand slam rings four-hole design with torx screws adds gripping strength and added security.Plus weaver's legendary cross-lock design provides the ultimate in scope lock-down.Made of solid steel these rings stand strong against aggressive recoil.Weaver's grand slam rings are made in the usa.Type: Ring SetTube Diameter: 1"Height: Extra HighSize: 1"Finish: Matte BlackStyle: WeaverMaterial: SteelOne Or Two Piece: 2Mount Type: Warne/WeaverLock Type: Cross Lock