After a lot of designing, fabricating, and polishing, we came up with a way to make a very rigid metal box tie! MetalBondage.com proudly presents: the Rigid Box Tie Device! This modular device connects the neck to the waist with an adjustable heavy steel plate (for girls of different heights), and has a heavy steel adjustable waist belt. In between, there’s a solid heavy box with two small wrist cuffs inside, which will keep the arms in a perfect position. This device is inescapable, as our test model Yu found out. Even with the keys, she couldn’t do anything at all. Naked and angry, Yu looks awesome in our new device! The front view is so minimalistic with its clean collar and waist belt! A perfect posture training device!