A wrecker is a motor vehicle which is used to pull broken or damaged vehicles to a place where they can be repaired or broken up, for example after an accident
{i} machine that wrecks, machine that tears down; one that salvages or removes wrecks; rescue vehicle; one who wrecks or tears down buildings as a profession; one who loots shipwrecked or destroyed ships
Wreckers are people whose job involves destroying old, unwanted, or damaged buildings