40 Piece Metric Tap & Die Set - 17 Tops & 17 Dies - TZ01-05640This Set Includes Nc, Nf, And Apt Sizes. It Offers 17 Taps, And 17 Dies, Plus Two Types Of Tap Wrenches And Much More. This Set Comes In A Storage Case. These Pieces Are Heavy Duty, Heat Treated, Rust resistant, Precision Machined To Exacting Standards, With Precision Ground And Polished Susfaces. You Will Find Everything You Need Here To Do The Job Right Everytime.* Nc, Nf And Npt Sizes * 17 Taps And 17 Dies * 2 Styles Of Tap Wrenches * Heat Treated,