It is a model #2310 Lock Right by Power Trax. It is new in the box, includes both c-clip (screw in retainer) and non c-clip (roll pin retainer) pinion shafts (center pins). It will fit the following vehicles.
1987-92 YJ Wranglers with a Dana 35 rear axle and will fit all 1993's except axle bill of material #605528
1984-93 XJ Cherokee with a Dana 35 rear axle except bill of material #605528
1986-92 Comanche with a Dana 35 rear axle except bill of material #605528
Bill of material #605528 is the number for the axle with the ABS carrier.
The carrier is different for this bill of material number and it is used in some 1993's. 1994 and later all have the same ABS carrier.
Hopefully this will prevent any confusion.
The box indicates the location of the bill of material number
They that can give up essential
liberty to obtain a little temporary
safety deserve neither liberty nor safety.