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Title: Pretty good
Review: The skin on my fingers are naturally very thick, but not hard, and it's somewhat difficult for me to build up my calluses with these, but it still does the job. From the picture it kind of looks like guitar strings, but in person it's more like spikes made to look like guitar strings. Also, with this being on a hand strengthener, it's not very practical to use often, since my fingers are far too weak to even use the hand strengthener (it's just been sitting in a drawer), and I get tendonitis after using it just a little bit.
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