These reamers in these sets are cobalt steel for good performance on hard-to-machine materials. They create a tighter or looser fit than standard reamer diameters.

Straight-flute reamers are for general purpose cutting.

Spiral-flute reamers have a right-hand spiral and a right-hand cut. They pull chips upward as they cut, so they’re often used in blind holes. Spiral flutes create a smoother finish than straight flutes and work well in keyways and other applications with an interrupted cut.

For technical drawings and 3-D models, click on a part number.