Fact is you don't need them, Just repalced all of my springs without compressors, use the bottle jack! I was full time motor trade about 15 years ago, bought Snap On tools when I could, still got all of them because I quickly learnt that if you buy inferior tools you will replace inferior tools on a regular basis, Snap On tools all have lifetime guarantee which means a life time, if they break without being abused they will replace F.O.C. Anyone who works in the trade will tell you that cheap tools won't last!