Left Hand Tap and Die Set Thread Tools UNC UNF UN 1/4 5/16 3/8 7/16 1/2 9/16

Specifications: Left hand tap and die set, UNC UNF UN etc, 1/4-20, 1/4-24, 1/4-28, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-20, 7/16-14, 1/2-13, 1/2-20, 9/16-12, 9/16-18, 5/8-11, 5/8-18, 3/4-10, 3/4-18, 7/8-9, 7/8-14, 1-14.

eBay