Reams both inside and outside edges of tube at a 60° included angle with hardened cutting blades. Deburrs both clockwise and counterclockwise. For 3/16" to 1-1/2" (5 mm to 38 mm) O.D. copper, aluminum and brass tubing. Three (3) hardened steel cutter blades. Tough die cast body is shaped to fit comfortably in palm. Blue finish. Wt. .63 lbs.