USA Made KnKut Step Reamers accurately starts on contact and enlarges and deburrs holes in material up the 1/2" thick. Gold Oxide treatment enhances lubricity, reduces friction and increases toughness.
Size Range: 3 Piece Set Includes 5/16" - 9/16", 9/16" - 13/16", 13/16" - 1-1/16"
90° Notch Point starts holes easily
5 hole enlargement steps
3/8 Shank Diameter
3-Flats on Shank