These reamers are cobalt steel for good performance on hard-to-machine materials. The shank diameter is slightly smaller than the reamer diameter.

These reamers are carbide-tipped tool steel for excellent abrasion and heat resistance when cutting hard and abrasive materials. The shank diameter is slightly smaller than the reamer diameter.

Use a straight-handle tap wrench (sold separately) to turn these reamers by hand. The cutting end is slightly tapered to ease hole entry for the final sizing of drilled holes. Choose a straight-handle tap wrench that fits the diameter of your hand reamer.

Straight-flute reamers are for general purpose cutting.

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

These reamers have a 1/4”-28 threaded shank. All have a built-in pilot with a 45° chamfer angle to maintain alignment in the hole.

Use an adjustable wrench or straight-handle tap wrench (sold separately) to turn these reamers by hand. When the reamer wears down, twist the set screw to expand the diameter, and then grind the reamer to its original size. The cutting end is slightly tapered to ease hole entry for the final sizing of drilled holes.

These reamers are not designed for producing holes larger than the listed diameter or for producing holes of various sizes. The adjustment screw should never be loosened.

Straight-flute reamers are for general purpose cutting.

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