strength 4241 speed steel drill bit with nitrided surface treatment — built for reliable drilling and hole expansion in thin metal sheet. Key benefits Durable cutting core: Made from 4241 speed steel for strength and improved edge life compared with ordinary carbon bits. Hard, wearresistant surface: Nitriding increases surface hardness so the bit maintains performance through repeated use. Designed for thin metal work: Capable of drilling and expanding holes in iron and aluminum sheets up to 2 mm thick, giving consistent results on common sheetmetal tasks. Broad compatibility: Suitable for electric drills, bench drills, and other standard drilling machines, making it easy to use with existing workshop equipment. What this solves Replaces dull or brittle bits that fail on thin sheet metal by providing a harder, more durable cutting tool. Reduces rework and wasted material by producing controlled holes and clean expansions in thin iron and aluminum up to 2 mm. Works across multiple drill platforms so you don't need a special tool for sheetmetal jobs. Features and performance Material: 4241 speed steel — strength for cutting and resisting deformation. Surface treatment: Nitriding — increases surface hardness and wear resistance. Function: Drilling and hole expansion on up to 2 mm iron and aluminum sheets. Compatibility: Electric drills, bench drills, and other common drilling equipment. Practical use scenarios Automotive bodywork: drilling and enlarging mounting holes in thin iron panels during or retrofit. Metal fabrication and enclosures: making accurate holes for fasteners in 1–2 mm aluminum or steel sheet used in brackets, panels, and housings. Home and workshop projects: installing rivets, screws, or grommets in thin sheetmetal components for DIY repairs or assemblies. Usage tips Use moderate speed and steady feed pressure appropriate for thin metal to avoid overheating or distortion. Secure workpiece and use proper clamping to prevent vibration and ensure accurate hole placement. Inspect the bit regularly and when cutting performance diminishes. This drill bit is a practical choice for anyone working with thin iron and aluminum sheet who needs a stronger, longerlasting option compatible with common drill equipment.