Black Steel Folding Self Defense Brass Knuckles

Can be transformed into a Self Defense Knuckles very easily, unique creative design! It can pass airport security check easily. Riveted connection—will not come loose. Full 304 Stainless Steel Made, Black Oxide Finish, no rusting, and very durable. Only 110g, very light. Inner diameter is 23mm, approx Size 13. Special attention before purchase.