A set of 3 countersink drill bits, made of high-speed steel and stainless steel, with sizes 4-12/20/32 mm, triangular pyramidal titanium coating, hexagonal shank, suitable for drilling holes in materi

This new set of stepped conical high-speed steel drill bits is made from high-quality high-speed steel and coated with titanium to reduce friction and heat. Ideal for drilling various materials, including steel, brass, wood, and plastics. Made from M42 high-speed steel with a titanium coating for optimal friction and heat reduction. No pre-drilling or pre-grinding is required. Automatic deburring occurs during drilling. Particularly suitable for thin metals, steel, aluminum, copper, brass, fiberglass, PVC, etc. Unique stepped design. This drill bit set allows you to drill holes of different diameters, offering a comprehensive range. Designed to accurately drill holes from 4 mm to 32 mm in diameter with optimal speed and precision. Easily identify the desired diameter thanks to the laser-engraved dimensions in the drill bit grooves. High-speed steel and titanium coating. Our step drills are made of high-strength high-speed steel (HSS) and coated with a titanium coating for increased durability. High-speed steel tools are suitable for most general applications, combining hardness and toughness for optimal wear resistance. These durable drills allow for repeated drilling of materials such as plastic, aluminum, copper, stainless steel, and wood. They are stable and require no pretreatment. Caution: When using these drills, the material temperature can be very high; add water or coolant to prevent fumes. Suitable for wood, plastic, and thin metal parts with a hardness of 25 HRC or less and a thickness of less than 5 mm. The recommended speed for step drills is 250-400 rpm. Always wear safety glasses when using this tool. Length: Countersunk drill #5: 4-12 mm, length: approx. 6.7 cm / 2.64 inches Countersink bit #9: 4-20 mm, length: approx. 7.4 cm / 2.91 inches Countersink bit #15: 4-32 mm, length: approx. 3.5 cm / 2.91 inches 10.2 cm / 4.02 inches The 3 - The sizes are between the following: Size 1: 4-12 mm (4 mm, 6 mm, 8 mm, 10 mm, 2 mm); Size 2: 4-20 mm (4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 14 mm, 16 mm, 18 mm, 20 mm); Size 3: 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm).