Ground conical drills are made of high-quality HSS and coated with titanium. Designed for thin-walled steel sheets, metals. Drills out thin sheets without pre-drilling. The drills are titanium-coated, which extends their service life several times longer than conventional HSS drills. The drills are graduated every 2 mm and have a laser-cut measurement (number) that allows you to control the size of the hole while drilling. Drilling range: 4-12 mm, 4-20 mm, 4-32 mm Graduation: every 2 mm Shank: 6 mm Color: gold Quantity: 3 pcs Soft case included