HN1457 Features: -Material types: high carbon steel for hand tapping applications and high speed steel for machine tapping where critical dimensions are required.-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.-Precision ground straight flutes provide rapid chip removal for efficient threading.-Designed for hand threading work.-Taps produce a class 2B thread.-3 to 5 threads chamfered.-Most common chamfer.-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 Fractional Plug Tap 11/16"-16 NS. Warranty: -Lifetime warranty does not cover abuse.