People Four-Blade Serrated Eccentric Drill Full Ceramic Tile Hole Saw Cement Concrete Super Hard Alloy Drill Bit 8mm

Six major upgraded manufacturing processes to solve drilling difficulties

Eccentric design with quick chip removal and heat dissipation

Four large chip removal grooves on the head for smooth debris ejection and cooling

Double R groove hexagonal shank for secure grip and no wobble during impact drilling

Serrated teeth arranged in alternating offset pattern for layered chip cutting and faster drilling

Suitable for direct dry drilling without burning the drill bit

Spiral grooves enlarged for rapid chip evacuation

High hardness and sharpness, improved by 60% in sharpness and 80% in drilling efficiency

Can drill over 420 holes continuously without degradation

Ideal for drilling in ceramic tiles, full porcelain tiles, marble, granite, quartz stone, concrete, brick walls, wood, plastic, glass, and various metals with water cooling

Suitable for use with electric drills, impact drills, screwdrivers, and bench drills

All dimensions are manually measured; actual product may vary slightly

Select appropriate size and working depth according to drilling requirements