This tap set is made of high speed steel and has a 7/16 inch, 9/16 inch, 0.7000 inch, 11/16 inch, 29/32 inch, 1⅛ inch diameter shank. It includes a wooden case, sizes 1"-11½, ½"-14, ¼"-18, ⅛"-27, ¾"-14, ⅜"-18, and is for use with all materials, and meets the standards for USCTI. This PTT series tap set has a bright (uncoated) finish, and has fractional inch measurements. It has right hand direction with a 2⅛ inch, 2 7/16 inch, 2 9/16 inch, 3⅛ inch, 3¼ inch, 3¾ inch length.