
Before buying I met reviews that the set consists of CR-V. Why? These are not Schuko sockets. CR-V is actually harder and more expensive than CR-Mo and is the ideal material for these non-impact heads. The largest of the bushings is CR-Mo and will likely withstand impact, but again these are not shock bushings. Please get at least a rough idea of what you are buying before making a complaint. You are reliable. Although this is one of those items that the average home user rarely uses, you never know when you might need it. I compared the GM oil print head to a similar Lisle head and the quality was MUCH better. The Lisle socket is functional but has rough and sharp edges on the inside. The Gearwrench head is very well made and was actually cheaper considering the price per head. Lifetime guarantee gives you peace of mind. In general I am very happy with them. If I encounter any durability issues I will update my review.

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