Vintage early 20th century boxwood handcuffed candle holder

Vintage early 20th century from China boxwood and carved can hold the candle. Very strange carving for those of you that know what it is you will know right away for others like myself. I don’t know what to make of it. It’s interesting. That’s why it was given to meand the rest I don’t know anything about. I can tell by the label and the bottom that it’s old but I can’t read it. Please make a comment if you know anything about this.