This M2 straight flute tap is made of high speed steel and has a 0.168 inch diameter shank. It is designed for use with all materials, and meets the standards for ANSI B94.9-2008. This 311-90445 series straight flute tap has a bright finish, and has pipe measurements. It is non-coolant through, has right hand direction with a 2⅛ inch length. Plus it has two flutes and a straight shank.