wear (one's) fingers to the bone

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wear (one's) fingers to the bone

To work excessively hard. Likened to literally wearing the skin off of one's hands. I have worn my fingers to the bone renovating this house, and I'm glad to say that it has all been worth it. You have everyone wearing their fingers to the bone. You need to give them a break or they'll burn out.
See also: bone, finger, wear