The sets combine the individual Heaven's Hell items into cheaper groups. You can order 2 bangles or 2 bangles and a choker or 2 bangles + 2 anklets + 1 choker. You can also choose the surface quality, as well as the color of the lock. The material thickness is 10mm extra strong and therefore very heavy. So 2 bracelets weigh 1250g, 2 x arm and 2 x anklets 2500 g and a collar 1300g!