HSS step drills for drilling and deburring thin sheets, pipes and profiles made from various materials. To ensure reliable torque transmission, all step drills have a three-surface shaft. HSS step drills with premium HICOAT coating HC-FEP are wear resistant and versatile as they can be used to process steel, stainless steel (INOX), non-ferrous metals, thermoplastics and duroplastics. Step drills with HICOAT coating HC-FEP provide good high-temperature hardness and resistance to oxidation. They can therefore also be used on hard materials without the addition of coolants. The set includes 3 HSS step drills in the versions 412 mm (9 steps), 420 mm (9 steps), 430 mm (14 steps) with a premium HICOAT coating HC-FEP for industrial uses. To ensure reliable torque transmission, all step drills have a three-surface shaft. The sturdy plastic box protects the tools against dirt and damage. The securing of the HSS step drills facilitates the selection and withdrawal of the tools.