These rather clever handcuffs are not based on any particular design. They use the hamburg 8 lock which is operated using a flatish disk pushing against the wedge shaped catch inside to release them (see picture). The internal circumference of each 'cuff is 7 1/2 inches or 9cms. They weigh around 770 grams or 1 lb 11 ounces. Important to know what to deduct if you weigh yourself wearing these!
In stock, goods normally sent immediately unless otherwise stated.