Step drills of Bahc

For making of openings in thin sheet metal the step drill Covered nitride with the titan with such superficial hardness which by from 4 to 5 times spills drill head service life in comparison with usual longer. The same covering reduces friction, leading to the fact that the tool works cooled, and samosmazyvatsya actually during the work dry Perfectly the Step drill from 5 to 35 mm is suitable for drilling of openings in thin metal sheets. 5 mm, 13 - 35 mm from 2 mm vozrastniy the Shaft 1/2" (12.7 mm)