This replacement pipe threading die is designed for use in pipe threading machines. - It creates a right-hand threading direction and features alloy steel construction. Pipe Threading - Item / Pipe Dies Set for Threading Machine Die Heads For Nominal Pipe Size / 1/2 in to 3/4 in Threads per Inch / 14 Die Material/Type / Alloy Steel Pipe Thread Type / NPT Thread Direction / Right Hand For Use With / 4CW40, 4Z974, 5A195 Threading Machine Die Heads and RIDGID Model# 504A, 713, 816, 817 and 842 Universal Die Heads Number of Pieces in Set / 4