Please don't waste your time and other people with our products cheaper than the shop responsible tell friends friends no comparability， the cheaper you buy back Ito tell you the truth usually slow to use can also be used， but if you slam the brakes or fat or child seat use or use in pregnant women or running speed when itwill not work. The circlip is everything if circlip unreliable drag card at the bottom of the tow card that is not a word can solve the problem， it is the life is not a plaything， so high quality all depend on! All of the words do not consider in friends!