Deli Four-Blade Serrated Eccentric Drill Bit for Tile Drilling High Hardness Dry Wear-Resistant 6+8+8+10+12+ Storage Box

True dry drilling without blade breakage; upgraded 2nd generation unbreakable blade technology

No water needed for dry drilling on tiles and hard materials

Four independent cross blades for reduced vibration and enhanced stability; if one blade is damaged, others remain effective

Enlarged and thickened drill head for increased contact area, faster drilling, and higher wear resistance

Serrated alternating staggered tooth design for layered chip removal, enabling faster and more efficient drilling

Wide chip removal grooves with alternating cutting edges for improved debris evacuation during high-speed operation

Double R-slot hexagonal shank for tight fit and no wobble; suitable for impact drilling

High hardness and durability suitable for drilling various materials including ceramic tiles, full tiles, marble, granite, quartz stone, concrete, brick walls, wood, plastic, and glass

For metal materials such as steel plates, iron plates, aluminum alloy, and copper, water cooling is recommended