Enhance your drilling efficiency with this high-performance Hole Expansion Drill Set, expertly crafted from durable hard alloy for superior hardness and low incision resistance. Featuring a specially treated drill head and a fully ground, anti-rust painted surface, these drills provide smooth and precise drilling on a variety of materials including ceramic tile, glass, brick walls, and wood. Key Features: · Superior Drill Head Technology: The drill heads undergo a special process to achieve high hardness and minimal incision resistance, ensuring clean and efficient cuts. · Anti-Rust Painted Surface: Fully ground and treated to resist rust, the smooth surface promotes effortless drilling and long-lasting durability. · Single Threaded U-Type Chip Discharge Groove: Designed for optimal chip removal, this feature ensures smoother drilling and prevents clogging. · Ergonomic Triangular Handle: Provides a secure grip that is easy to clamp and minimizes slippage, enhancing control and safety during use. · Versatile Application: Suitable for use with hand electric drills, table drills, and other drilling equipment, offering flexibility for various projects. · Wide Material Compatibility: Ideal for drilling through ceramic tiles, glass, bricks, wood, and more. Specifications: · Condition: 100% Brand New · Material: Hard Alloy · Tool Holder Type: Triangle Handle · Cooling Type: Outer Cold · Blade Top Corner Angle: 45° · Category: Hole Expansion Drill · Weight: Approx. 131-179g (4.6-6.3oz) · Handle Diameter: 2.5-9mm · Chip Groove Length: 40-75mm · Blade Diameter: 3-12mm · Blade Length: 80-120mm Package Includes: · 5 Pieces Hole Expansion Drills (6-12mm) Note: For optimal performance and tool longevity, please ensure to add water for cooling during use. This drill set delivers reliable durability, precision, and ease of use for both professional and DIY applications.