Could be a repackaged arb knock-off. For that kind of money I would buy name brand.
I found these claims interesting.Most of these lockers are at least $100 less than the smaller ARB price. They feature a 2 year warranty like ARB, these are also a 4 pinion design with a great actuator system. TJM use's a piston type actuator that doesn't have a rotating sealing surface like the ARB. Both TJM and ARB are great lockers but we wanted to offer one more option!
Thought I'd chime in to keep the Urban legend at a minimum
Not made in China
Not an ARB copy.
Not a Zip Locker copy.
TJM has been been manufacturing in-house and selling Pro-Lockers since 2005.
Design was patented over 20+ years ago by Jack McNamara and is now owned by TJM.