Pressing erasers onto pencils.
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Previously:
https://www.homemadetools.net/forum/...106#post176299
https://www.homemadetools.net/forum/...501#post122786
https://www.homemadetools.net/forum/...189#post184660
https://www.homemadetools.net/forum/...029#post160597
https://www.homemadetools.net/forum/...875#post167717
