Everything worked pretty well for the first few weeks. I really like the light at the head of the ruler and it comes in handy when cleaning under the table/bed where it's usually dark. But the quality of the reference leaves a lot to be desired. It just fell off after a few weeks of use. As a result, the roller does not roll evenly on the parquet floor, and when rolling, a large, unpleasant noise comes out. I can't stand it and I don't use it anymore. Good design but bad quality. I would not recommend that.
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