This set is made from high grade tungsten steel. Contains SAE 
Coarse, SAE Fine, and Pipe Combination thread.  All dies are 
hex shaped. Sizes include one tap and die of the following : 

4-40
6-32
8-32
10-24
10-32
12-24
1/4-20
1/4-28
5/16-18
5/16-24
3/8-16
3/8-24
7/16-14
7/16-20
1/2-13
1/2-20
1/8-27 Pipe Tap

PLUS: 1 long handle adjustable tap wrench, 2 ‘T’ handle tap
wrenches, 1 die handle, 1 screwdriver, and 1 pitch gauge.
LIFETIME REPLACEMENT WARRANTY just send back
broken piece anytime for free replacement.