Review on Double Ended Motion Pro 4-Pin Spanner Wrench - 34.5mm Size by Adam Price

This tool is essential when you pull off the engine but the part it is used on on the nut is very soft aluminum and if you don't hold the tool perfectly straight the tabs on the engine will break Alloy collar. Be careful! Not being the best mechanic I now know there are other methods to remove this collar after a real mechanic showed me but what do I know. It's still very useful.