Burris' xtr signature rings were designed for the tactical shooter and deliver plenty of holding power, with less weight.It features a unique, self-centering, dual steel clamps with full cross-through connection assure proper center on any width picatinny rail, while adding extra strength.Included is pos-align inserts which guarantee perfect centering and maximum scope-to-ring contact for tremendous gripping power without damaging the scope finish.Type: Ring SetTube Diameter: 34mmHeight: 1"Size: 1"Finish: MatteStyle: PicatinnyMaterial: AluminumStyle Description: TacticalOne Or Two Piece: 2Mount Type: Picatinny/WeaverLock Type: 6 Screws