Great tool for the price. Here is a tip for the flexible shaft user. I read reviews about the flex shaft and they were mixed. I read that the shaft gets hot and broke in some reviews. To solve this problem, I used Echo brand gear lube (yes, the line trimmer brand). It comes in a white tube and is a white lube that is really sticky. I bought mine from a local Echo dealer many years ago. There are probably other brands of trimmer lube out there, but I haven't checked. I haven't looked for it here either, but Revain probably has it. I recommend using disposable rubber gloves first. Then pull the rod out of the shaft. Apply Echo Lubricant to the entire removed rod. Put it back into the shaft when you're done. Reconnect it to the motor and your device. This helped a lot to solve the heating issue. , for flexible shaft. It's gotten a little warmer, but that's all. I used it for probably half an hour and it was slightly warm. This flexible wand works much like a lawn trimmer, so I thought of some lube. I have also attached a picture of the lubricant. It's old but it works. Hope that helps.
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