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Title: Serves its purpose
Review: I found that it does exactly what it's meant to: build calluses on your fingertips. This wasn't exactly what I bought these for, but I may have been presumptuous with what their capabilities were. They're not great for any exercises besides the individual finger exercises. I was hoping they would be effective at building calluses on other parts of my hand, but it's not the best way to do that. So I guess if you want to build those fingertip calluses for playing guitar or for any other reason, it'll definitely do that. You'll see pretty quick progress if you do it consistently, too.
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