Deli Extended Alloy Eccentric Drill Bit Set 8mm for Dry Drilling Tiles Glass Marble Concrete 3-Pack

Special extended offset eccentric head design for efficient drilling on concrete and ceramic tiles

Tungsten carbide cutting head for high wear resistance, impact resistance, and long service life

Double spiral chip removal grooves for smooth cutting and efficient debris evacuation

Hexagonal shank design for strong grip, durability, and compatibility with various drill chucks

Surface precision polishing and anti-rust treatment for enhanced durability and easier chip removal

Fast positioning and smooth cutting performance

No water needed for dry drilling materials; water cooling recommended for tiles, glass, and stone to extend drill bit life

1. Not recommended for use with cordless drills or screwdrivers below 18V due to insufficient torque.

2. Use water cooling when drilling tiles, glass, or stone to reduce heat and prolong drill bit life.

3. When drilling walls, avoid steel reinforcement bars to prevent chipping; change drilling position if encountered.

4. Start drilling at a 45-degree angle with light pressure to create a crescent-shaped positioning groove.

5. Maintain high rotation speed throughout drilling.

6. Drill vertically while gently rocking the drill to facilitate faster chip removal and improve drilling speed.

All measurements are manual and for reference only; please refer to the actual product.