- Professional tap and die set, 40 pieces, for manual threading work. - Made of heat-treated 45# steel and alloy steel, maximum hardness and long service life. - Includes 17 taps and 17 dies in sizes M3 to M12 and 1/8-271 NPT, covering common applications. - Adjustable tap wrench and T-handle wrench to fit different tap sizes. - Thread pitch gauge included to check the accuracy of created threads. - All tools marked with their size for easy identification and efficient use. - Ideal for maintenance, repair, and thread creation in automotive, machinery, and DIY projects. - Includes sturdy storage case to keep parts organized and protected.