6 pieces.

5 swivel sockets and one universal adapter.

3/8” drive

Two of the sockets have a letter K ground into them.

All pieces are Armstrong USA branded

Part numbers

3/8” 11-512

1/2” 11-516

9/16” 11-518

5/8” 11-520

3/4” 11-524

Swivel adapter 11-947