.3740 X 1-3/4 X 7″ High Speed Steel 6F Straight Shank Chucking Reamer (2006-3590) ~ High speed steel ~ ANSI standard. ~ Straight flute. ~ 45 degree chamfer allows gradual starting load. ~ Suitable for production reaming of most materials. ~ Flute length is 1-3/4″. ~ Overall length is 7″. ANSI standard. High speed steel Straight flute. 45 degree chamfer allows gradual starting load. Suitable for production reaming of most materials.