Bit

[hammer bit, hammer, grinder teeth or tips]

The bit is a wear item, that is generally bolted (but can be welded) onto the bit holder, that will take the wear and can be replaced for less money than the larger, more expensive bit holder.

Bits sized specific to each machine, and come in a variety of styles for different applications.

Bits are often called many different names, including: hammer bit, hammer, and grinder teeth or tips.