"My wife purchased the Andis PM1 over a year ago and never successfully used it. She tried 2-3 times over an extended period and wasn't cutting. She thought the problem was the spacer popping off, which in retrospect was happening because the blade was not cutting. She finally asked me to check it and I could see the blade was not moving. I removed the attachment plate and could see the blade notch was not seated in the tongue. I seated it properly but when I screwed down the attachment plate, I could hear it pop out. Took it to Petco and groomer got it working. However, at home it only worked a couple seconds and I found he had avoided popping the blade out of the notch by leaving the screws slightly loose. It always pops out when you properly tighten the screws. The nearest repair station is 100 miles away. It's a total loss throw away."