The set, from the company Kraft&Dele, consists of 13 high-speed steel (HSS) drill bits with double grinding, which significantly increases the precision and lifespan of the drill bit. Thanks to their precise construction, they allow for accurate drilling even at high speeds. Recommended for drilling in hard acid-resistant steel, stainless steel, and non-ferrous metals. Durable and reliable drill bits coated with titanium nitride, increasing the lifespan of the drill bit and improving the quality of the drilling.