Extension tap is used for tapping the hubs of pulleys for oil caps or set screws. The long shank is also ideal for reaching holes inaccessible with standard length taps. | High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. | Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications. | Round with square end shank. | Right-Hand cut tools have a cutting action that engages when they are run in a clockwise direction.