• Made with high-hardness carbide alloy material for greater durability. • U-shaped groove design and spiral grip for smoother drilling and easier debris removal. • Includes 10 drill bits in 5 different sizes: 5mm (2 pieces), 6mm (4 pieces), 8mm (2 pieces), 10mm (1 piece), 12mm (1 piece). • Tip with cross-angle design to reduce slipping and improve precision in tile cutting. • Compatible with quick-change power tools, including hand and bench drills. • Suitable for drilling materials such as tiles, glass, porcelain, marble, bricks, cement, plastic, wood, and mirrors. • Product dimensions: 0.5 cm wide, 9 cm high, and 9 cm long.