Are you talking about something like this? I've used one like this on 3 vehicles for over a decade.
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Yes, what name brand are you using and would you recommend it?
Love this thing. Had it about ten years. The rubber cap is nice because it keeps shit from getting in the lock.
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No brand named stamped on mine but pretty sure this is it: https://www.zoro.com/reese-receiver...MIrISp9byC4wIVEbjACh2wWQ-NEAkYCiABEgLUEfD_BwE
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Though it's on my truck, I've been using Reese for the past several years. I haven't tried to defeat it, so I don't know how hard that would be. I typically pull up to 12-14K pounds. The lock is still smooth and easy to use. No complaints. It's a simple lock.