Set of five drill heads with double-edge arc design and serrated carbon-steel construction Key benefits Faster material removal: The arc curve double-edge head quickly clears waste material so drilling goes faster and requires less effort. Accurate drilling every time: A centered tip design helps ensure precise positioning and reduces slipping, making it easier to start and maintain the correct hole location. Lower heat and longer life: High-quality carbon steel and a serrated grinding surface reduce friction and heat build-up for smoother operation and improved tool longevity. Versatile compatibility: The set includes five different sizes to suit a variety of drills and common drilling tasks. Features Double-edge arc curve head for efficient cutting and debris removal Centered tip design to prevent walking and improve accuracy Serrated grinding head profile to minimize friction and overheating Made from high-quality carbon steel for durability Five sizes included for broad application and drill compatibility Practical use scenarios Home improvement and repairs: Quickly drill precise holes for shelf brackets, anchors, and fixtures with less wandering and faster chip removal. Furniture assembly and cabinetry: Create clean, accurate holes for dowels, screws, and hardware when installing hinges or fittings. DIY projects and light construction: Save time on repetitive drilling tasks where reduced heat and longer bit life improve efficiency. What you get A five-size set of drill heads designed to improve drilling speed, accuracy, and tool life while working with a range of drills.