Pair these reamers with a compatible arbor (sold separately) to mount to your drill press or other machine. This setup lets you ream larger holes than other shank types. They’re also known as shell reamers.

Straight Flute—The most common flute style, these reamers are suitable for a wide range of applications, but not recommended for holes with a keyway or other breaks in the surface.

High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.