Immediately after unpacking I noticed the ergonomic shape. Fits comfortably and safely in my not exactly small hands. No comparison to a discount store items from my past. First, I spoke to the wood processing and, secondly, the size and thus great handiness. From the Edit my feet, I am completely convinced. In half the usual time, I have achieved a respectable result. Even under water, it is not a problem. Caution, however, when too much pressure is on the rough side filing. In sensitive areas prefer to choose the finer side. It goes well with less effort .... As well here the practice makes perfect. I'm concerned, a full purchase recommendation.