High-Hardness Titanium-Coated Alloy: Crafted from premium tungsten-alloy steel with a titanium film finish, these 4-flute eccentric drill bits deliver exceptional wear resistance and heat dissipation for extended life in heavy-duty masonry, metal, and wood drilling. 4-Edge Serrated Eccentric Design: Innovative four-flute serrated edge combined with eccentric threading cuts clean, precise holes and threads in one pass—no reaming or tapping required and minimal chipping on hard surfaces like glass and tile. Rapid Chip Removal & Cool-Down: Deep spiral grooves and serrated flutes efficiently evacuate debris and allow coolant flow, preventing clogging and overheating during high-speed drilling in concrete, brick, and stone. Universal Compatibility & Secure Hex Shank: Standard hex shank fits most electric drills, impact drivers, and manual tools. Anti-slip design ensures stable torque transfer and precise positioning across a variety of materials. Kit of 10 Sizes + Safety Gloves: Includes six high-performance drill bits (3mm. 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, 12mm, 14mm, 16mm) plus a pair of protective gloves—ideal starter set for professional contractors and DIY enthusiasts tackling diverse projects.

Upgrade your toolkit with our 4-Flute Serrated Eccentric Drill Bit Set, engineered for ultimate versatility and durability. Each bit is precision-ground from high-hardness tungsten-alloy steel, then coated in titanium for superior wear resistance and heat management. The unique eccentric cutting threads let you drill and tap in one swift motion—eliminating steps and ensuring perfectly clean threads without secondary tools.

Key Features & Benefits:

• All-in-One Drill & Tap: Eccentric thread geometry cuts and forms internal threads simultaneously, saving you time on metal fabrication, wood joinery, and masonry installations.

• Fast & Clean Performance: Four serrated edges slice through materials from soft plastics to hard concrete, while rapid chip evacuation prevents jams and keeps flutes cool.

• Multi-Material Mastery: Optimized for drilling into stone, glass, ceramic tile, concrete, brick, wood, metal, and more. For glass and marble, use with water cooling to extend bit life.

• Ergonomic Hex Shank: 1/4″ quick-change hex design locks firmly into standard drill chucks and impact drivers, delivering precise control and maximum torque.

• Comprehensive Size Range: Ten essential diameters (3/4/5/6/7/8/10/12/14/16 mm) cover most common hole-sizing needs. Plus, included gloves protect your hands during tough jobs.

Whether you’re a professional contractor installing anchors in concrete, a metalworker threading steel, or a DIY hobbyist crafting custom home décor, this masonry & metal drill bit kit offers unmatched efficiency and longevity. Add it to your Amazon cart today and experience the next level of drilling innovation!