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Fein MultiMaster vs. Cheap Chinese Clone
Comparing Fein tool, single speed, with Fein blade to Harbor Freight tool and blade. Task: cutting drywall.
Why? 1/8 the price, that's why.
I use this sort of tool to make cut-outs in existing drywall. The tool allows me great control of the cut, and the lack of vibration in the workpiece means I can almost always save a single piece and use it to patch the hole later.
Both tools were equally fast (not very) and controllable. The cuts were equally nice, and neither tool put much dust in the air.
The main differences were felt in the hand, rather in the results. The cheap tool seemed noticeably noisier, and it was much harder to feel when I encountered wood under the drywall. The cheap tool also produced more 'felt' vibration, and the head became quite warm.
Another difference was that blade changing was both quicker and more positive with the Fein. The chap tool needed a little bit of fussing to get the blade to sit just right.
Verdict? I'l be quite happy with the cheap tool until it wears out .... which I don't expect to be anytime soon ... then maybe replace it with a Fein.