These black knuckles come as a set of 2, made of high grade 6061 aluminum (aircraft grade) and heat painted black to blend with the night. They won't see it coming and they won't remeber it afterwards. When you don't want to announce your tactical advantage these are the hand to hand proper boxing knuckles for you. Easy to carry and fast to move. We will NOT ship to California, Illinois, Michigan or Vermont because of laws in those states restricting citizens rights to effective self defense tools. We even drilled and threaded a small hole in each one and include a small removable pin if you want to use them as belt buckles for even more concealment.