5-piece high-durability fine grain drill bit set in 4 sizes: 2x6mm (1/4"), 1x8mm (5/16"), 1x10mm (3/8"), 1x12mm (1/2"). Material: Premium tungsten carbide with reinforced head for enhanced hardness, crack resistance, and extended lifespan. Design: U-type housing for efficient dust removal, 3-flat shank for stability, triangular spear tip for precision, and high-efficiency spiral for smooth drilling. Performance: Sharp carbide tips ensure clean, smooth holes with no edge damage, improving work efficiency and positioning accuracy. Suitable for concrete, tile, brick, wood, plastic, and soft metals. For hard materials (glass, porcelain, ceramic, marble, granite), use water as lubrication. Specs: - Material: Carbide tip - Shank: 3-flat - Color: Gold - Sizes: 6mm, 6mm, 8mm, 10mm, 12mm Includes: 5x multi-material drill bits. Usage tips: - Apply water as coolant for hard materials to prevent overheating. - Reduce drilling speed/pressure for fragile materials. - Minor size/color variations may occur due to manual measurement or lighting. Professional-grade bits for fast, precise drilling with effective waste removal.