The quality was ok as far as I could use the set. Unfortunately it didn't work for what I needed. If you are removing the fan on an M119 engine (SL500 in my case) you will need something to hold the pulley while you loosen or tighten the fan's center bolt (the included 8mm allen key will do the trick). The kit includes a 40mm tool that fits the pulley bolts, but there is no way to insert a tool between the fan and pulley. However, I managed to hold the pulley in place by inserting one of the other wrenches between the pulley bolt heads.
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