PSC78 Security Chain Length 78". The Peerless Model PSC78 Security Chain is designed for corrections, transport and courtroom situations. When used in conjunction with a set of handcuffs and a padlock this simple chain quickly converts into a secure waist restraint. The specially designed end link is compatible with all commonly used handcuffs - Chain Link or Hinged. The end link can also be slotted into any link on the chain and will fit “Black” and “Blue” style security boxes. The 78 inch length and heavy duty clip allows for easy waist size adjustment.