Made of Metal and Enamel by Grindestroy Merch (Mexico). They feature butterfly clasps on the back for extra secure attachment. Manufactured of very good quality, these look super cool!

The size is about 1-3/4" by 1-3/4" (4.44 cm x 4.44 cm)

Art was drawn by Jasper Swerts (Infested Art) from Belgium and originally appeared on the PLF / Cyness split 7" from 2010.