Overview:BGS HSS Step Countersink Set - 3 pcs - 1616, expand your drilling to suit your different jobs with this set of HSS countersinks with titanium nitride surface treatment, sizes 1 to 3, neatly stored in their pouch.Benefits:In pouchPrecisionHSS steelFeatures:HSS Taper Burr, Size 1: 3 - 12 mm, 1 mm incrementsHSS Taper Burr, Size 2: 6 - 20 mm, 2 mm incrementsHSS Taper Burr, Size 3: 4 - 12 mm, 2 mm incrementsDrive Profile: Male hexagonalDrive profile size: 1/4" (6.3 mm)Material: HS steelSurface treatment: titanium nitrideWeight: 140 gPackaging:One set of BGS HSS step mills - 3 pcs - 1616Delivered in original packaging.