A Comprehensive range of standard boring bars & boring rings, with sizes and shanks to suit the vast majority of milling machine, boring machine and machining centre applications, is available to complement the MICROBORE fine boring cartridges and units. Features Rigid, stable constructionStandard boring range 12mm to 465mmInterchangeable boring rings for use with common adaptorsTwo-tool boring bars for combining boring and facing operations or rough and finish boringSpecial multi-tool boring bars are