Feature Highlights: 1. Spiral Chip Flute Design: Enables high-speed operation and efficient chip removal for smoother drilling and improved work efficiency. 2. Triangular Drill Shank: Universally compatible with various electric drill chucks, including those on hand drills, impact drills, and bench drills, for secure clamping and easy use. 3. Precision Cutting Edge: Features an incisive cutting design for sharp bites, delivering high smoothness and fast working speed on every job. 4. Multi-Material Versatility: Capable of drilling into a wide range of materials including wood, ceramic tiles, iron plates, plastic, red bricks, and walls. 5. Durable Carbide Construction: Made from high-hardness carbide material, offering low resistance during drilling for a faster and more efficient work process. Product Details: This 5-piece multifunctional drill bit set is engineered for precise hole opening across diverse materials. The spiral flute ensures quick debris removal during high-speed operation. The triangular shank provides a secure fit in most standard drill chucks. Built from robust carbide, these bits maintain sharpness and hardness to speed up your drilling tasks in wood, tile, metal, plastic, brick, and masonry. Specifications: Quantity: 5 x Drill Bits Item Type: Multifunctional Drill Bit Set Material: Carbide Drill Diameter: Approx. 10mm / 0.4in Total Length: Approx. 121.6mm / 4.8in Hole Depth: Approx. 72mm / 2.8in Shank Diameter: Approx. 7.5mm / 0.3in Drill Shank Type: Triangular Drilling Guide: Can Drill Directly Into: Wall, wood, aluminum, copper. Require Water/Coolant for Drilling: Steel, stainless steel, concrete, glass tile, red brick, marble, glazed surfaces, bubble brick, granite.