サムカフ 指錠
A smaller version of [[cuffs]] used to shackle a person's thumbs. Commonly designed as a small, rigid metal device than can lock the wearer thumbs centimeters apart, but chain-linked, mini-[[handcuffs]] version also exists. In [[bdsm]] practice, it also commonly used to restrain someone's big toes ([[toecuffs]]).
thumbcuffs