A hot knife is a luxury item, but nothing is better for cutting and sealing synthetic rope and fabric. We find ourselves reaching for it often. Until recently, we’ve been relying on a hot knife conversion for our 50-year-old Radio Shack soldering gun (see “The Unsung Hero of Canvas Work,” PS March 2020). But that gun bit the dust, and when we plugged the attachment into a new Weller gun of the same specifications, we were disappointed with the results. It takes too long to heat up and doesn’t get as hot. So we began a search for a dedicated hot knife that wouldn’t break the budget.
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