"These are fine for single connections or if you use lugs and a crimper, but the bolts are small and a little short, so two 10mm cables without lugs, used under a boiler for example, are quite hard to secure. Design wise, if the bolts on this one were longer/bigger it wouldn't help, because of their position in relation to the pipe (the bolt would be too close and damage the pipe). Some competitors products are better in my opinion. If I was using these regularly, I would buy something else."
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Review 10 for Earth Clamp EC14 Internal A-D 12-32mm Pack of 20