UP' LOCK is a type of LOCK that is used to secure doors and other items. It consists of three parts%3A a TAB%2C a TRESS and a HASP. The TAB is a small metal piece that is inserted into the door frame and secures the LOCK in place. The TRESS is a long metal rod that runs through the door frame and attaches to the TAB. Finally%2C the HASP is a metal loop that is attached to the door and secures the TRESS in place. Together%2C these three parts form the UP LOCK and ensure that the door or item remains secure.