Etched: Tap size and recommended drill bit size are etched on each tool for easy identification. Point styles: Taper, plug, and bottoming styles are available. All Hanson taps and dies are made in USA. Precision ground straight flutes provide rapid chip removal for efficient threading. Designed for hand threading work. Taps produce a class 2B Thread. 1 to 1 1/2 threads chamfered. Used when threads must go to bottom of hole. Ideal for all general purpose threading. Ideal for tough threading work, routine maintenance, repair and for re threading where high accuracy and tolerance thread is not critical. High Carbon Steel Machine Screw Plug Tap 4 40 NC. Warranty: Lifetime warranty does not cover abuse.