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The Ultra Fab "Ultra 3002" electric tongue jack on my toyhauler uses a handle exactly like that.
Rusty & Cheryl 2011 F250 2WD 6.2L Gasser 2008 Weekend Warrior FB2100 "Common sense is in spite of, not the result of, education" - Victor Hugo (1802-1885)
The Barker 3500 on the trailer uses a square tube handle. I can't remember what what out last tongue jack handle looked like, bu it was also a Barker and I think we gave the new owner the handle for it.