7pcs Carbide Four-Blade Serrated Drill Bit Set for Dry Drilling Porcelain Tile Ceramic Glass Marble Concrete Stone Hole Openner

✅How to use:

✅Many people tend to set the drill speed to a high level at the beginning, which can easily cause the drill bit to break,
We suggest gradually increasing the rotational speed of the drill bit.

✅This drill bit can drill metal, but it is generally not recommended to drill metal,
Please be aware that metal is relatively hard and can significantly shorten the lifespan of the drill bit.

✅Need to drill while adding water(When drilling harder materials, adding water can extend the lifespan of the drill bit!):
Ceramic tiles, Glass, Marble, Vitrified bricks, Granite, Aluminuplate, Iron plate, Copper plate.

✅Dry directly without addingwater:
Red brlck, Gubble brick, wood, Plastic, Antiqum hrick, Concrete.

✅Notes:

1. Manual measuring, please allow 1 ~ 5mm error,Thank you.

2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
We guarantee that the style is the same as shown in the picture.