1 X 1.212 X 1.103 X 1-3/4 X 3-3/4 Taper 3/4 Spiral Flute Pipe Reamer ~ Right hand cut tapered to 3/4″ per foot. ~ Designed for reaming holes to be tapped with American Standard Taper Pipe Taps (NPT). ~ Large end diameter is 1.212. ~ Small end diameter is 1.103. ~ Flute length is 1-3/4″. ~ Flute length is 3-3/4″. ~ High speed steel. Right hand cut tapered to 3/4″ per foot. Designed for reaming holes to be tapped with American Standard Taper Pipe Taps (NPT). Large end diameter is 1.212. Small end diameter is 1.103. Flute length is 1-3/4″.