Blueing Finish Folding Knuckles Rings

Can be transformed into a Real Brass Knuckles very easily, unique creative design! It can pass airport security check easily. CNC processing, all edges are treated smoothly Full Stainless Steel Made, Blueing Finish, no rusting, and very durable. Only 110g, very light. Inner diameter is 23mm, approx Size 13. Special attention before purchase.