The Cuff. Mikuta: Beautiful hand cuff with a detachable ring. There are small magnets keeping the cuff together. The ring is fitted with a spring and an opening and is very easy to attach and detach with one hand for maximum security. Inner diameter 56mm / width 2cm / thickness 4mm / weight 125g Made of stainless steel (grade 316L). Made in Germany. https://mikuta.com/products/the-cuff