I should have read the reviews first. I purchased an electronic set of MulWark 3/8" digital torque wrenches. Like the other comments, I tried several batteries. There was a comment about the battery cover contacting the bottom of the battery shaft not making contact. I used a long Phillips screwdriver to scrape off the coating. And it only works if I put the batteries in with the positive (+) side down and the negative side on the end of the battery cover. I had to send it back but now it works perfectly. My suggestion to everyone else: DO NOT BUY THIS.
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