Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Might scratch your violin

The fittings where the bow-right attaches to the violin are hard plastic (not rubberized like I thought), which seems like it could scratch my violin pretty easily. I'm an adult learner, and thought that this might be able to help me learn to bow straight, but after trying it once, I'm really not comfortable putting it back on my violin. If you don't bow correctly, it's easy to smack into this and move it around a bit.If you have a cheaper violin that you're not worried about scratching, you might want to give this a try, but it was a waste of money for me.