What kind of drill bits are used in impact drills, and what is the difference between drill bits and metal bits in general electric drills?
Hard. Cannot use the drill bit, you can use the drill, and drill, impact drill bit can be used, is drilling the wall and concrete, it is made of alloy steel welding
The head should be inlaid with hard alloy, the bar is alloy steel bar, you can go online to check the relevant information, it is alloy steel.
