This one-piece aluminum base is machined to tight tolerances for a custom fit.It offers maximum strength for rings to hold tight.Screws are included.Fits savage 10, 11, 12 & 16 (short action), striker pistol, 510, 512, 516, s/a 10ml(2pc only) pre 2003 models.Type: 1-Piece BaseModel: Top MountStyle: Top MountMisc: N/AFinish: Black MatteMaterial: AluminumPieces: 1Gun Type: RifleRings Included: No