HSS Jobbers Twist Drill Size # 54 1.40mm, 0.055' Made in The U.K. (Dormer) Package of 10. Quality made HSS twist drills made to exacting tolerances. Bright finished, with exactly the proper cutting angle at the tip. Flutes are sharp with the proper spiral and finished outer edges. The finest grade tool steel, tempered for maximum hardness and endurance. Individual drills packaged ten to a see-thru tube and labeled with the drill size for easy identification.