As a hesitant buyer, I wasn't sure if this fitting spanner would be worth the investment.However, after using it on my automotive fuel system, I`m impressed with the quality and ease of use. Thanks to my knowledge gained in practice, I can confidently say this is a great addition to any performance car tool kit. The billet aluminum IS durable and the spanner fits snugly on a variety of fittings. The only con is that it may be a bit expensive for occasional use. Overall, I highly recommend this fSee full review