Full name of road-block removal truck wrecker, also known as trailers, road-side assistance cars, drag cars, lift, drag and lift traction and many other functions, fault vehicle wrecker is mainly used for roads, urban traffic and emergency rescue, and so on. Towing truck by category is divided into: towing-separation of conjoined, towing, one for one, flat one for two, multi-functional road-block removal truck, hydraulic automatic clamping type. According to traction tonnage divided into: 2 ton, 3 ton, 5 ton, 8 ton, 10 ton, 15-ton, 25-ton, 30 tons, 50 tons, 80 tons. Divided by brand: Jac wrecker, Isuzu wrecker, and Dongfeng wrecker, Hongyan heavy-duty wrecker, Steyr heavy-duty wrecker, jiangling road-block removal truck, Iveco wrecker. Wrecker carries its usage can be divided into categories, lifting traction class. Vehicles carrying class is damaged on the traction vehicles taken away, crane mounted on vehicles for traction class is lifting one end of the traction device damaged the car hold up (or lifted) off the ground, still on the ground at the other end, and then by lifting tractor-wrecker towed away from the scene. Wrecker category is basically by using the truck-chassis modifications, according to the road-block removal truck structure can be divided into hauling, loading, lifting, rescue (single arm-and-arm) the wrecker.