Dormer E000 Powdered Metal Spiral Point Threading Tap, Gold Oxide Finish, Round Shank With Square End, Plug Chamfer, M8-1.25 Thread Size Thread forming design cold-forms threads in through holes and blind holes without producing chips Gold oxide reduces grinding stress within the tool Powdered-metal steel for performance approaching that of solid carbide tools, with the toughness and shock-resistance of high-speed steel Lubricant grooves to improve coolant flow Modified bottoming chamfer has additional length to reduce chip load, add tool life, and permit higher tapping speeds