Must have for any home mechanic. I rounded the head of a M6 bolt, with a M10 hex, holding my ignition coil in my engine. Because it's a boxer engine and access is extremely limited, had this not work, I would have had to pull the engine out to get to the bolt. Glad to say it worked very well. The angled edges dug into the bolt head and it come out easily.
Must have for any home mechanic. I rounded the head of a M6 bolt, with a M10 hex, holding my ignition coil in my engine. Because it's a boxer engine and access is extremely limited, had this not work, I would have had to pull the engine out to get to the bolt. Glad to say it worked very well. The angled edges dug into the bolt head and it come out easily.