So, just looking at it, I think it's going to be pretty useful. They've packed a lot of useful stuff onto it. I can't tell you how many times I've used a caliper to figure out the size of a component, or pin pitch. Link to it below, it's only $4.95 if they haven't sent you a free one and you want one. Worth way more in usefulness to me.
http://www.digikey.com/product-detai...LER-ND/5767550

http://www.digikey.com/product-detai...LER-ND/5767550
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