What material are the handcuffs made of?

Handcuffs are usually made of manganese steel. In order to avoid being easily opened, most handcuffs have a double lock function. The initial state of handcuffs and the state after handcuffing are both single locks. At this time, the handcuff ring can rotate in one direction, handcuff people's wrists tightly. \ r \ When the handcuffs are fixed, they can be locked and become double locked. At this time, the handcuffs can't be rotated, and they are tight and can't be opened directly. It needs to be unlocked first, then turned into a single lock, and then a single lock can be unlocked before it can be opened. In the double lock state, the tenon will not move, which can avoid being easily pried open by tools such as iron wire. \ r \ For more information about handcuffs, please visit:/ask/a95c8a1615833265.html? Zd view more content