This premium 6-piece step drill bit set features titanium-coated HSS (High-Speed Steel) construction for superior durability and performance. Each bit is precisely engineered with multiple diameter steps clearly marked for accurate hole sizing from 4mm up to 32mm. The titanium coating reduces friction and heat build-up while drilling, extending the life of the bits. Perfect for working with sheet metal, plastic, and wood materials, these step drill bits create clean, burr-free holes with minimal effort. The set includes three different stepped configurations plus specialized bits for various applications, all neatly organized in a sturdy storage case for easy transport and protection. The fluted design helps efficiently remove material while drilling, preventing binding and ensuring smooth operation. These professional-grade step drill bits are ideal for both DIY enthusiasts and professional contractors who need versatile and reliable drilling tools for multiple hole sizes.