Standard Pack = 1 piece(s). Class=High Performance Taps; Class of Fit=D6; Coating=2% Vanadium; For Use With=Steel; Material=High Speed Steel; Number of Flutes=3; Overall Length=4-1/32 IN ; Type=Spiral Point Tap; Size=M18x1.5; Thread Length=1.083 IN ; Size Type=Metric; Special Feature=General Purpose - Blue Band;