I removed the fan clutch which had a right hand thread and the mechanic insisted the thread direction was left hand. When he applied a left-hand thread and hit the nut the wrong way, he broke the tool and rounded the edges of the nut [35mm] when using the wrong wrench [36mm]. I bought this exact replacement tool for a friend of mine who loaned me a broken tool. The replacement tool has not yet been used, but I hope I never have to replace a fan clutch again.