I made the mistake of buying this tool to change my rear brake pads on my car thinking that I could get away with getting the cheap tool. I wish I would have just paid a little more for the right tool as this one was such a pain to use.First: There weren't any pin sets that fit my rear brake pistons. There was one side that had 4 house shaped pegs on the corners. I had to grind off two of the pegs and I could use that side. Those house shaped pegs were the only ones that actually fit in my car's pistons.Second: The metal is so soft on this cube thing that when the cube slips out of the slots in the calilper, the metal deforms and becomes rounded off, and it makes it that much harder to use. After it slips off about 10 times, it is almost unusable. I had to frequently go back and use my dremel to remove more material off the pegs to make them flat again on the sides that had rounded off.Third: Eventually those pegs got too small and they would slip out even though they weren't rounded off. I had to switch to another side that had two round pegs out at the corners. However those round pegs were too big, so I had to go back to my dremel to grind them down a bit to fit. Then started the process of slipping and grinding again.Fourth: This cube tool does not compress the piston while turning it. The compression comes from your arm pushing on it, and if you don't push it perfectly straignt, the cube slips. So, you can't put that much force on it. This leads to taking WAY longer to compress the pistons then it should take. With the proper tool that compresses and turns at the same time, these pistons should be able to be compressed in about 5 minutes each. However, with this tool, it took me over two hours to compress ONE piston.Fith: Because of all the grinding I had to do, this tool is now worn out and wouldn't be good to use again on another brake job. So I'm going to have to buy another tool when it comes time to do rear brakes again.There is nothing good about this tool. The only redeeming quality about it is that I was eventually able to get the job done. There were times in the middle where I thought I was going to be running to the auto parts store to buy/rent the proper tool, but it did make it through. It probably would have been quicker to make a trip out and get a new tool though.Do yourself a favor and don't buy this tool. I wouldn't buy any of these cube tools based on my experience with this one. Just spend a little more and get one of the rear brake piston sets that compresses the piston while turning. I wish I had done that, and I will do that for my next brake job (Since this tool is now trash).