20Mm SDS Plus Rotary Hammer Drill Bits Carbide Tipped For Brick Stone and Concrete

1.Double spiral chip flute: When encountering thick steel bars in the wall, there will be no sticking or damage. When encountering thin steel bars under 1/4", you can easily pass through. Please bypass when you encounter thick steel bars. Performance exceeds the traditional one-line two Electric hammer drill with blade.

2.Upgraded cross four-blade masonry drill bit set : This four-blade carbide drill bit has a wider bearing surface than ordinary two-blade sds bits, high wear resistance, and long-lasting durability. the brick drill bit can be used for various cement wall concrete red diamond wall stone openings.