General description This universal drill bit set is designed for use with cordless drills, low-speed drills, and multi-purpose drills. It features a diamond-ground 4-flute design for reduced drilling pressure and improved centering, allowing for combined drilling in wood and masonry. The set is ideal for drilling through various materials including bricks, ceramic tiles, aerated concrete blocks, wood, drywall, limestone, slate, marble, and reinforced plastics. Technical specifications Sizes: 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 10 mm, 12 mm Suitable for cordless drills, low-speed drills, and multi-purpose drills Only for rotary drilling — not suitable for hammer drilling Drilling speed: 90-129% faster than comparable products Diamond-ground 4-flute design for less pressure and better centering Material compatibility: bricks, ceramic tiles, aerated concrete, wood, drywall, limestone, slate, marble, reinforced plastics Compatibility and accessories Compatible with cordless drills Compatible