I left my coffee grinder at a friend’s house (long story).
Fortunately, I have this, which I picked up at a resale shop for a couple of bucks several years ago; it filled a hole on my knickknack shelf.
It’s not as fast as electric, but I can use any exercise I can get.
(The pliers are for the adjustment ring under the wingnut. At last, a wingnut that works with the people, not against them.)