Description:Full metal construction, steady and durable.Precise machined and easy installation.Used for multiple attachments such as flashlights etc.Fits for 20mm dovetail rails, for scopes tube with1''/ 25.4mm.Comes with a hex wrench for convenient installation.Specification:Material: MetalSize: Approx. 20 × 28 ×48mm/0.78 × 1.10 × 1.88”Packaging Material: Paper BoxPackage Includes:2 Pieces Ring Scope Mounts1 Piece WrenchNote:Please allow a slightly errors due to manual measurement.Due to the difference between different monitors, the picture may not reflect the actual color of the item.Thanks for your understanding and attention.Wish you a pleasant shopping experience!