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Title: Poor design and defective
Review: My old self piercing tester died so I purchased this Great Neck unit from Amazon. It was dead on arrival so I returned it to Amazon. I am a dedicated Amazon shopper and their excellent return policy is one of the primary reasons. In addition to the tester being defective, the piercing tip is far too large. If you used it on anything smaller than primary wire, it could very likely break the wire in half!
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