Material and durability: Made from grade HSS M2 for longlasting use and reliable performance during repeated drilling tasks. Improved hardness and heat resistance: Cobalt coating increases hardness and helps resist heat buildup, allowing more consistent, precise drilling in demanding conditions. Size range: Available in sizes between 13 mm and 15 mm to cover common largehole requirements without frequent bit changes. Reduced shank design: The reduced shank allows secure seating in standard drill chucks, making these bits compatible with most handheld and bench power drills. Performance advantages: Designed to maintain cutting edge longer, reduce chatter, and produce cleaner holes with fewer blowouts or pilot errors. Why you need it: If you work with larger holes or tougher materials, this HSS M2, cobaltcoated option extends tool life, improves hole quality, and fits existing drill chucks so you don't need adapters. Typical applications Metalworking and fabrication: enlarging bolt holes, fitting bushings, or making clearance holes in brackets and plates. Automotive and maintenance: creating or restoring larger holes for fasteners and components. Construction and maintenance: drilling larger anchoring or installation holes where durability and compatibility with standard drills are important. Compatibility and use notes Fits standard drill chucks and most power tools due to reduced shank. Choose the correct size between 13 mm and 15 mm for your specific hole requirement. Use appropriate speeds and lubrication when drilling hard or heatsensitive materials to maximize bit life.