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 Set Tube Diameter: 1 Height: Extra High Size: 1 Finish: Matte Black Style: Weaver Material: Steel One Or Two Piece: 2 Mount Type: Warne/Weaver Lock Type: Cross Lock