Union Butterfield 1700S High-Speed Steel Hand Tap Set, Uncoated (Bright) Finish, Round Shank With Square End, 3-Piece Set (1 Taper, 1 Plug, 1 Bottoming Chamfer), M8-1.25 Thread Size Hand threading tap set with straight flutes cuts threads in through holes and blind holes Produces ANSI standard right-hand threads in metric sizes High-speed steel is compatible with a variety of materials Uncoated (bright) tools have no additional surface treatment or coating, for use on a broad range of materials Round shank with square end allows tap to be used in hand or power-driven applications