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Lopper sharpening
(aussie.zone)
For all things related to the Aussie gardens. Plants, lawns, ugly fences, bare patches.
Please follow the instance rules and keep discussions civil and respectful.
Another option: 2. Dremel/grinder that bolt and screw off, then replace them with new ones.
This sounds dramatic, but it might be the best option because that nut and bolt look like they're old enough to be imperial measurement not metric. Thanks to the US there are still plenty of imperial measured tools about, but there are less in Aus, and it'd be annoying to have to buy specific imperial sizes just for this tool when you could probably replace the nut and bolt with a similar sized metric nut and bolt.