know if there is a wrist to waist restraint that allows me to lock myself in?

My Queen has asked me clean the house then lock myself into something to keep my hands at my waist. No matter how I do it so far… I can always get out. Has anyone ever seen something where I would put the wrist restraints on, then lock them into a belt of some sort? One handed of course. I tried a rope harness with a pair of hand cuffs on each side. That kinda worked but was far from ideal. I’m looking for something like this: but that can be donned by myself. Any ideas?