2 pieces: Electric damage.
4 pieces: ATK while a Shocked target is present.
Read the linked source for exact values and activation text.
DRIVE DISCS / PATCH 3.2
Thunder Metal
Electric equipment set.
Electric
RECORD IDTHUNDER-METALFACT CHECKED
Electric equipment set.
2 pieces: Electric damage.
4 pieces: ATK while a Shocked target is present.
Read the linked source for exact values and activation text.