Cosplay set made of red and black synthetic leather, adjustable with chains. - Colors: Red, Black - Materials: Synthetic leather, stretch material - Features: With chains, adjustable buckles Thank you for viewing. This is a human collar, two hand cuffs, and a chain to attach them. It seems you can connect the two hand cuffs together or attach them to the collar. That's why I thought there were hooks here. There are also wristbands to prevent wrist pain. I haven't used them at all, but I have opened the package. I hope they will go to someone who will use them.