High-quality HSS drill bits for durable, reliable drilling Key benefits Durable construction: Made from high-quality materials for long service life and consistent performance. Wide size range: Includes HSS drill bits covering 12 mm to 35 mm for common hole sizes. Stable 1.27 cm shank: Equipped with a 1.27 cm (12.7 mm) shank to provide stability and compatibility for torsion drilling in steel and other metals. Versatile use: Designed to drill iron, steel, plastic, wood, copper, aluminum and other metal materials without frequent bit changes. What this solves One solution for mixed-material jobs: Use the same HSS bits on metal and non-metal surfaces to reduce tool changes and save time. Better control on tough materials: The robust shank and HSS cutting edge help maintain accuracy and resist bending during heavy-duty drilling. Fewer replacements: Quality materials and construction extend bit life and reduce downtime for re-sharpening or replacement. Features at a glance Material: High-speed steel (HSS) for improved wear resistance on metal workpieces. Size range: 12 mm – 35 mm. Shank diameter: 1.27 cm (12.7 mm) for stable mounting and torsion resistance. Suitable for: Iron, steel, plastic, wood, copper, aluminum and other metals. Practical applications Metal fabrication: Drilling clean holes in steel plates, fabricated parts or forged components during workshop and industrial work. Maintenance and repairs: Creating or enlarging holes in metal housings, brackets and machine parts for fasteners or assemblies. Home improvement and mixed-material projects: Installing fixtures, running bolts through wood and metal assemblies, or drilling copper and aluminum components. Specifications (consistent with product) HSS drill bit sizes: 12 mm to 35 mm Shank: 1.27 cm (12.7 mm) Materials: High-speed steel cutting edge; durable construction for long use Buy with confidence when you need a robust, versatile drill solution for metal and mixed-material work that maintains stability under torsion and offers a practical size range for common drilling tasks.