High-speed steel twist drill set — 3 sizes Key benefits Durable construction: Made from high-speed steel (HSS) for greater toughness and longer life than ordinary spiral drills. Reduced friction and heat: Surface coating lowers friction, helps control heat buildup and extends tool life during repeated use. Clean, precise holes: Ground cutting edges produce smooth, round holes with minimal burring for a neat finish. Versatile set: Includes three sizes to cover different hole-diameter needs without swapping tool families. What it does for you Cuts quickly and reliably in a range of materials so you can complete jobs faster with fewer tool changes. Keeps a consistent hole diameter and edge quality, reducing rework and fitment problems. Coating and high-speed steel composition help the drill retain performance under normal workshop and field conditions. Compatible materials and performance Designed for use in perforated metal, iron, aluminum, brass, wood, plastic and similar materials. Suitable for conventional drill presses and handheld drills when used with proper speed, clamping and cooling practices. Set format lets you choose the right size for the material thickness and hole requirement. Practical use scenarios Metalwork: Drilling clean mounting holes in perforated sheet metal or aluminum panels for brackets and enclosures. Wood and DIY: Making tidy round holes for dowels, fittings or hardware in furniture assembly and home projects. Light fabrication and maintenance: Drilling brass or iron parts for repairs, prototypes or small equipment assemblies. Includes Three high-speed steel twist drills in different diameters (three sizes included to meet a range of drilling needs). Notes for best results Use appropriate drill speed and clamp the workpiece securely. For metal work, apply cutting fluid or intermittent drilling to control heat and extend drill life.