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.

Undersized Fractional—Undersized reamers are smaller than the fraction by 0.001" in diameter to create a tighter fit than standard sizes. They're typically used to press-fit a pin, bearing, or other object into a hole.

Carbide—For the highest level of accuracy when cutting hard materials, these are our hardest, strongest, and most wear-resistant reamers. They're used on materials such as iron, hardened steel, steel alloys, and plastic. Their hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the reamer from breaking.