5 Best Air Die Grinders - Dec. 2021 - BestReviews
Most air die grinders have a 1/4-inch collet. The range of bits available is enormous. However, for delicate work, a bit with a 1/8-inch shank might be preferred. Some air grinders come with an optional 1/8-inch collet, but not all, and adapters may or may not be available, so this is actually quite an important factor. Exhaust valve