Hex-Shank Grinding Bits | McMaster-Carr
Use bits in any drill chuck that accepts a 1/4 " hex shank.. Bits are aluminum oxide, which is the most common abrasive used in grinding metal. They are also known as mounted points and die grinder bits. Head diameter is measured at the widest point.. Caution: As bit shank is exposed beyond 1/2", maximum safe rpm decreases significantly. Refer to …