It's cheap and simple, but it works. I was able to put them on keys of different sizes/shapes. However, if you have a wrench with a very large end, it may not fit. House keys of normal size are usually sufficient. Ratings are correct, albeit in an uneven distribution of colors. I was lucky to get at least 2 copies (one for me, one for my roommate) in 4 different colors (red, blue, yellow and black). I also had other colors but they were not in 2 copies (e.g. 1 orange). There is some blue and dark blue that are almost the same. and dark blue is difficult to see in low light compared to black. So I chose the "highest contrast" colors I could. Given the low price, I'm happy with this purchase. However, don't bet that there will be a certain number of a certain color. It's a color lottery. much luck.
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