I remember the last time and friends drove out to travel in his car, something is caught my eye, that is “slack adjuster” it is a simple repair tools, from the appearance point of view is very exquisite, my knowledge on these aspects is lacking, and I chat with friends on this topic, I listen to the friends he has been optimistic about the “slack adjuster“, not only because of its exquisite appearance, and its quality assurance, manufacturers of the service, and reasonable price, together with the carrying is very convenient, and the health of the plant factory scale is large, there are many manufacturing plant in the world, listen to what he says. I think I should also prepare such an emergency tool to my car.