Our factory brings you a versatile and durable drill bit set with an automatic center punch for precise hole-making in metal surfaces. The set includes six pieces of high-quality steel step drill bits, each with 50 different sizes and coated with titanium nitride for added strength and wear resistance. This professional-grade set is suitable for a wide range of metal-drilling applications, including sheet metals, aluminum, copper, stainless steel, and more. The automatic center punch ensures a precise starting point for drilling, making the process easier and faster. Trust in our factory's commitment to quality and precision, and get this essential set for your metalworking tasks.