Standard Pack = 1 piece(s). Class of Fit=H3; Coating=Bright; Material=High Speed Steel; Number of Flutes=4; Overall Length=4 IN ; Type=Hand Taps; Size=5/16 IN -18 IN ; Style=Plug; Thread Type=NC; Size Type=Inch; Shank Diameter=0.24 IN ; Special Feature=Small Shank;