This M35 spiral point tap is made of cobalt and has a 0.367 inch diameter shank. It is designed for use with all materials, and meets the standards for ANSI. This N413-91225 series spiral point tap has an oxide finish, and has fractional inch measurements. It is non-coolant through, has right hand direction with a 3⅜ inch length. Plus it has three flutes and a straight shank.