Browning's t-bolt rimfire stanard rings are machined from aircraft grade alloy, giving you a precision, lightweight, high-strength optic mounting solution for your hunting rifle.They are ultra-rigid vertically split rings that use oversize hardware for extra strength and ease of installation.Note: these rings require browning's proven two-piece bases and are not compatible with a picatinny rail or weaver rail.Type: Ring SetTube Diameter: 1"Height: StandardFinish: MatteMaterial: SteelOne Or Two Piece: 2Mount Type: Browning-Style 2-Piece Base