3 Piece NPT Taper Pipe Tap Set ~ Thread ground. ~ High speed steel. ~ Cuts internal threads in pipes. ~ Ideal for pipe fitting. ~ Tapered at a rate of 3/4″ per foot. ~ Includes 1 each of the following sizes: 1-1/4~11-1/2, 1-1/2~11-1/2 and 2~11-1/2. Thread ground. High speed steel. Includes 1 each of the following sizes: 1-1/4~11-1/2, 1-1/2~11-1/2 and 2~11-1/2. Cuts internal threads in pipes. ~ Ideal for pipe fitting. Tapered at a rate of 3/4″ per foot.