Upgraded 6/8/10/12mm Set Four-edged Sawtooth Drill Bit For Tile Drilling and Concrete Special Electric Drill Hardness Drill Bit

High-concerned chemical : None Origin : Mainland China Certification : CE Model Number : Drill DIY Supplies : Woodworking Material : High Carbon Steel Type : Center Drill Bit Use : Metal Drilling Type 1 : 4pcs High Strength Eccentric Drill Bits Type 2 : 4pcs Spirals Four-blade Eccentric Drill Bits Type 3 : Four-Blade Eccentric Drill Bits Type 4 : 4pcs Eccentric Drill Bits Type 5 : 4pcs Four-Flute Sawtooth Eccentric Drill Bits Occasion 1 : for Plastic/Cement Occasion 2 : for Metal Plastic Occasion 3 : for Tile Concrete Occasion 4 : for Wood/Tile/Etc Occasion 5 : for Glass/Brick Feature 1 : Professional Sturdy Drill Bit Set Feature 2 : Versatile Eccentric-Twist Drill Bits Set Feature 3 : Multifunction Drill Bits Set Feature 4 : Efficient High-Speed Dry Drilling Bits Set Feature 5 : High Hardness Concrete Drill Bit Set