In a number of projects I assemble, there are soft metals near bolts I have to tighten. Often, the side of the wrench will hit these metals and mark them up. I added Sugru to the area under the wrench opening which gives me a good grip and when the wrnch hits the metal - doesn't mark it at all.

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More by richspoon:Sugru fix for key fob Sugru grip and bumper for combination wrench Sugru extension to USB dongle 
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